NOAA’s satellites are on the chopping block. Here's why we need them.

On Friday, The Washington Post reportedly obtained a memo from within the Trump administration about proposed funding for National Oceanic and Atmospheric Administration (NOAA). The memo outlined steep cuts to several divisions, including the elimination of the $73 million Sea Grant research program, cuts to climate research divisions, and more.

But the biggest cut The Post reported was to the agency's National Environmental Satellite, Data and Information Service—NOAA’s satellite division—which would see its budget cut by 22 percent, or $513 million. The operates 16 satellites __that orbit the Earth at a wide variety of altitudes and positions, gathering data __that researchers in both the public and private sector rely on to do their jobs.

The 45th administration has previously proposed deep cuts to NASA’s Earth Sciences division. NOAA and NASA frequently work together to launch satellites capable of monitoring conditions here on Earth. Cutting both programs to the bone would impact not only climate researchers, but the lives of everyday citizens.

Here are 14 things that NOAA’s satellites help monitor, from agriculture to baseball.

They help us see what’s coming.

If you've ever checked the news before a big weather event, you’ve already seen NOAA’s satellites in action. While some images of major storms are captured by NASA satellites, it’s NOAA satellites that are tasked with monitoring weather 24/7 as it’s forming, following everything from blue skies to blizzards.. While the NOAA division that is responsible for much of the forecast—the National Weather Service (NWS)—would only see a budgetary cut of about five percent, the NWS frequently relies on data from NOAA satellites to make their forecasts more accurate.

They help other people see what's coming, too.

The world is a big place. It’s far too large for any one country to monitor all the weather alone. But just focusing on what’s happening inside our national borders isn’t very useful when a Polar Vortex moves down from Canada, or a Hurricane skirts the Bahamas en route to Florida. NOAA’s satellites are part of a global network of countries around the world that cooperate and exchange satellite imagery, dispersing data on ocean temperatures, weather patterns, and more. They even coordinate on responses to natural disasters.

They help farmers.

NOAA satellites don’t just monitor weather. They also monitor agriculture across the country. Data from NOAA satellites is essential in the USDA’s monitoring of plant and crop health. In addition to measuring soil moisture, precipitation, and temperature, NOAA satellites help farmers get information about plant health, vegetation heights, and water supplies (like lake levels) which can help farmers keep their crops healthy, or help them prepare for a bad year.

They give us a better perspective.

NOAA satellites help us get an otherwise impossible perspective on severe weather events. They monitor wildfires from space, helping firefighters get a wider view of whats happening in the inferno they’re fighting on the ground. They also monitor ice conditions in rivers in winter, which can help predict and prevent severe winter floods. Knowing where the ice is and how it's moving allows officials to warn people downstream before the ice dam breaks.

They’re getting better all the time.

NOAA’s latest satellite, GOES-16, can do things that no other satellite can do. On Monday, NOAA showed off one of the satellite's most shocking new features—a lightning tracker that allows forecasters to get an even more advanced view of thunderstorms, giving them a heads-up when a storm is intensifying. The satellite enables forecasters to give the public more warning when a serious storm is about to strike.

They help find faster trade routes.

NOAA’s satellites monitor sea ice, which is rapidly thinning. While that’s not great in general, melting in the Arctic does mean that the Northwest passage, a route between Asia and Europe across the Arctic, is slowly opening up. That means faster trade, but only if shipping companies (or cruise lines) know when the sea ice has receded enough for safe travel. NOAA satellites are ready to give captains a heads up.

They save hundreds of lives each year.

In 2016, NOAA satellites helped save 307 lives. The satellites are part of the Search and Rescue Satellite Aided Tracking (SARSAT) System, a global network that helps pinpoint emergency beacons on land and sea, helping search and rescue operations rescue people stranded just about anywhere on the planet.

They’re helping baseball teams.

Even Major League teams turn to NOAA to play ball. Last winter, an undisclosed team contacted NOAA’s National Centers for Environmental Information, part of the National Environmental Satellite, Data and Information Service that also oversees satellites. The team was looking for weather data. Even small changes in altitude, humidity, and temperature can change how the ball moves during a game. Sure, it’s a small thing—and not nearly as important as wildfires or storm tracking—but it is the great American pastime.

They can see public health risks before we can.

You can’t necessarily track individual mosquitoes from space. But NOAA can and does track malaria risk using satellites by monitoring vegetation in malaria-prone areas. It can also track the development of algal blooms, which can be toxic to ocean life (and, by extension, to the humans that rely on those fisheries.)

They help keep the lights on.

GOES-16, DSCOVR and the other NOAA satellites aren’t just pointed at the Earth. They’re also watching what’s coming in from space. NOAA is the agency that gives power companies a heads-up if they notice any solar flares or coronal mass ejections streaming off the sun. Solar wind can cause serious issues with power grids on Earth, which is why energy companies rely on NOAA to keep our power-hungry society going strong.

They help us fly safely.

NOAA’s history with flight goes back to the very beginning. Their precursor, the U.S. Weather Bureau, helped the Wright Brothers choose Kitty Hawk as the site for their very first flight. That legacy continues today. Satellites monitor aviation hazards like volcanic ash.

They help us clean up after ourselves.

When the Deepwater Horizon disaster struck in 2010, NOAA’s satellites tracked the oil slick as it spread. Since then, NOAA has continued developing technologies that would make responses to future oil spills even more detailed.

They help us stay hydrated.

While some of the best data on droughts comes from on-the-ground measures of soil moisture, precipitation, and other factors, satellites can help measure the extent of droughts ravaging communities and farmland. NOAA satellites track droughts using multiple measures, including vegetation health.

They help us get the big picture.

The only way to figure out how much the climate is changing is to actually monitor those changes over a long, sustained period of time. NOAA has monitored the Earth from space for decades, observing not only ocean and land temperatures, but also environmental changes like shifting snowpacks, migrating ocean nutrients, the spread of smog-causing aerosols, and rising floodwaters.

22 stunning images that turn science into art

For two decades, Wellcome Images has presented awards to the best scientific and medical images __that enter its collection each year. This year's collection is stunning, with portraits, illustrations, and microphotography vying with 3D models and scans for the title of overall winner. Individual awards for these winners and the grand prize winner will be announced on March 15.

These 22 images were selected by nine science communicator experts, but you can have a voice too. Vote for your favorite before August 31, and you'll have a chance to win a print of one of these incredible images for yourself.

Parachute practice, a CT scanned pigeon, and other amazing images of the week

Arrests 'big step' in chimp trade battle

Chimpanzee
Image caption This baby chimp, Nemley junior, was rescued in a police operation in Abidjan

A series of dramatic arrests of notorious wildlife traffickers is being hailed as "one big step" against the illegal trade in baby chimpanzees.

Last weekend one of the most prolific animal dealers in West Africa was found and detained in Guinea.

Prior to the arrest, he had been on the run for four years.

This followed the arrest last month of the dealer's father who was regarded as the key figure in a vast smuggling network spanning the region.

And only a few months ago a year-long BBC News investigation led to the arrests of two traffickers, Ibrahima Traore and his uncle Mohamed, in neighbouring Ivory Coast.

Videos circulating on the black market showed dozens of baby chimpanzees held in a distinctive blue room __that served as their holding centre while buyers were sought.

Chimpanzees as a species are listed as endangered because their populations are dwindling in the face of deforestation and poaching but a collapse in their numbers in West Africa means they are described as "critically endangered" there.

It is against international law to seize or sell the chimpanzees but baby chimps are in big demand as pets for wealthy buyers in the Gulf states and Asia and our investigation revealed a flourishing and secret trade.

Our undercover reporter was offered two of the tiny animals for $12,500 each.


The secret trade in baby chimps

A secret network of wildlife traffickers selling baby chimpanzees was exposed by a year-long BBC News investigation.


The two men arrested in Ivory Coast are known to have links with the pair arrested in Guinea, Abdoul Salam Sidibe and his father Abdouramane, who have been accused of shipping hundreds of endangered animals including chimpanzees.

One of the investigators who worked on the case, Mamadou Saidou Barry of the wildlife organisation GALF, working with the Eagle Network, said the Sidibe family operated in five countries and paid as many as 100 poachers to capture chimpanzees.

"This is not the end," he told BBC News, "It is not the final fight but it is one big step, but it is a never-ending battle against wildlife trafficking. "

Guinea has long been regarded as a hotspot for wildlife trafficking and has even been barred from issuing export permits for any shipments of animals under the CITES convention (Convention on International Trading in Endangered Species).

Nearly two years ago, the official in charge of the CITES office in Guinea, Ansoumane Doumbouya, was arrested and later sentenced to 18 months in prison for selling fraudulent export permits to the Traore and Sidibe families, among others.

Last month he was given a presidential pardon and is now out of prison.

The head of the CITES secretariat, John Scanlon, told us __that he believes that law enforcement can act as a deterrent.

"Once you arrest them, you prosecute them, you incarcerate them, that message starts to get out , that wildlife crime is not high profit-low risk. The risk is I might go to jail."

Mr Scanlon also confirmed that since our investigation, in which we had managed to buy two fraudulent export permits, warnings had been circulated worldwide to look out for potentially forged documents from Jordan and Liberia.

Image caption Nemley Jr meets David Shukman

The permits sold to us were apparently issued by those two countries though the governments of both have denied that the documents were genuine.

In terms of quantity, the illegal trade in chimpanzees is dwarfed by the slaughter of elephants for their tusks or rhinos for their horns.

But capturing a live baby chimpanzee in the jungle involves shooting its mother and many other members of its family as well - up to ten adults are estimated to be killed for each infant chimp seized alive.

The prosecution of the Traores in Ivory Coast is the first ever brought for wildlife trafficking in the country and campaigners say it is evidence of a shift in official attitudes towards the fight against the traffickers.

Dople Claude Soro, chief of staff of the Ministry of Water and Forests, says describes the cae as "important'.

"Those who did these illicit operations - those operations were forbidden and we can see them as a crime. Those people are to be punished."


You might also like to read:

Our changing attitudes to chimpanzees

'Staggering' extent of great ape trade

Cheetah now 'running for its very survival'


The new focus on wildlife crime is seen as potentially offering a chance to turn the tide on the traffickers though with plenty of risks ahead.

The UK's Africa minister, Tobias Ellwood, visiting Ivory Coast, told me that one key requirement was to improve safeguards for wildlife.

"We are seeing a recognition that more needs to be done but this is a massive problem - many of the places like national parks where these animals are to be protected simply don't have the protection."

Estelle Raballand, an expert in chimpanzees, is hoping to win support for the country to set up its first sanctuary for chimpanzees.

She says that if the Ivorian government has decided to make wildlife trafficking a priority, then it follows that there needs to be capacity to care for the confiscated animals.

"You cannot apply the law unless you have a place to put the chimps, "she says. .

And although she is pleased at the recent wave of arrests, she warns that time is running out.

"We're fighting a war of extinction…if we don't do anything and the rate is continuing, pretty much everyone agrees that in 10 years there will be no more wild chimpanzees in West Africa. And that's terrible."


A baby chimp rescued - David Shukman

Image caption Nemley Junior chews a BBC business card

Since the first reports of our investigation into chimpanzee trafficking just over a month ago, many people have asked about the fate of the baby chimp, Nemley junior, who was rescued in a police operation in Abidjan.

At the time, he was thin and nervous and soon suffered a heavy cold. But with expert support he recovered and has since been putting on weight and becoming more active with brighter eyes and an engaging curiosity.

I watched him guzzling a bottle of infant formula and then clambering over the supports of a trestle table before amusing himself by gently slapping my knee.

He has formed a bond with his keepers, especially one called Charles Aby, who has learned how Nemley junior clamours to be held as much as possible, a natural response for an infant who would normally be with his mother for five years.

So Charles goes about his duties at Abidjan zoo with Nemley clinging to his side.

And the tiny chimp is becoming bolder. As I handed out my BBC business cards at the zoo, Nemley reached for one and promptly started to chew it. At the moment, he's thriving, a survivor of the traffickers and a new icon of the fight against them.

Follow David on Twitter.

Sentinel satellite launched to picture Planet Earth

Sentinel-2B Image copyright ESA
Image caption One of the big attractions of 2B and the other Sentinels is the free and open data policy

One of the key spacecraft in Europe's new multi-billion-euro Earth observation (EO) programme has launched from French Guiana.

Sentinel-2B carries a large camera to image all land surfaces and coastal waters in visible and infrared light.

It joins an identical spacecraft, Sentinel-2A, already in orbit.

The duo will be flown on the same path but 180 degrees apart so __that they can provide a complete map of Earth - clouds permitting - every five days.

The Sentinels constitute the space segment of the European Union's Copernicus environmental monitoring programme.

A suite of sensors is being lofted over the next few years to gather critical information on the state of the planet and to acquire the data needed to inform and enforce EU policies.

Applications range from urban planning and air-quality monitoring to tracking deforestation and glacier retreat.

Image copyright Copernicus Sentinel data/ESA
Image caption The biggest use of Sentinel-2 data is in agriculture

Sentinels 2A and 2B are, in many senses, the centrepiece of this effort because their free and open picture resource will almost certainly find the widest use.

"To say they are the 'heartbeat' is a good way to describe them because they take the images __that are most easily understandable," Josef Aschbacher, the director of Earth observation at the European Space Agency (Esa), told BBC News.

The lift-off aboard a Vega rocket occurred on cue at exactly 22:49 local time, Monday (01:49 GMT, 02:49 CET, Tuesday).

Ejection of the satellite happened about an hour later, roughly 775km above the Earth.

Controllers in Darmstadt, Germany, were waiting to pick up a signal and begin early operations.

"We will slowly acquire the reference orbit (786km altitude) over the next two weeks," explained Bianca Hoersch, Esa's mission manager for the Sentinel-2 spacecraft.

"Then we have the commissioning phase; that takes us to early June. At that point we should be producing lots of data, and after a short ramp-up, around the October timeframe, we should be in full constellation readiness."

Image copyright Copernicus Sentinel data/ESA
Image caption Musa Bay, Iran: Inland and coastal waters are also targeted

The cameras on the Sentinel-2 pair are designed to see colour features as small as 10m across.

Together, they will be producing something like four terabytes of data daily. It is a prodigious volume that will lean on the assistance of a laser relay link.

For a 10-minute spell on each orbit, the spacecraft will each fire their images not down to Earth but higher into the sky, to a geostationary satellite that will then bounce them to the ground.

Thousands of users have registered to have access to the pictures. Downloading them from the various distributed servers has been made easier by chopping the "scenes" up into more manageable chunks.

"With Sentinel-1A, we had at the beginning huge products that were 8GB to 9GB per file, which were really hard to access and download," said Dr Hoersch.

"In September, we switched to single tiles, a product of 100km by 100km, and I think that has led to an explosion in data access. We've had 2.7 million products downloaded in the last two months."

Image copyright ESA
Image caption Artwork of Sentinel-2: The European satellites are part of a multi-billion-euro programme

Sentinels are designed to fly in pairs to shorten the revisit time to any one point on Earth.

Sentinel 1 is a radar platform and has its duo fully operational in orbit since last year. Sentinel 2 is the next to complete its pairing; Sentinel 3, which carries predominantly ocean sensors, should have an orbiting pair aloft come next year.

Sentinels 4 and 5, which study the atmosphere, and Sentinel 6, to measure ocean height, have no presence in orbit yet.

But even though the programme is still to complete its initial roll-out, the EU and Esa have already begun to discuss how to extend it.

In this future-scoping, Sentinel 7 is envisaged to be a constellation of satellites that monitors carbon dioxide; Sentinel 8 could be a thermal infrared sensor, useful for understanding phenomena such as drought; and Sentinel 9 might be polar mission, either to study the extent and thickness of ice surfaces or two provide better weather imaging and communications at high latitudes.

"But I should stress that all these candidate missions are a work in progress and will have to be consolidated through an extensive consultation process, both on the user side and on the technical side," said Dr Aschbacher.

"And we also have to put together a whole scheme, not just on content but but also in terms of cost and funding."


Using Sentinel-2 data to make maps

Image copyright Copernicus
Image caption Space imagery can be used to make density maps for urban planning - in this case, Munich
  • Agriculture: Gathering crop statistics and yield assessments
  • Urban: Planning city-wide infrastructure improvements
  • Forests: Checking de- or re-forested areas for treaty purposes
  • Biodiversity: Understanding the habitats where wildlife exist
  • Health: Tracking conditions associated with disease spread
  • Water: Evaluating water body extents for flood assessments
  • Disaster: Making damage maps following major earthquakes
  • Cryosphere: Mapping snow fields and glacier melting

The European-funded Sentinel series

  • Sentinel-1: Radar satellite that can see the Earth's surface in all weathers
  • Sentinel-2: Multi-wavelength detectors to study principally land changes
  • Sentinel-3: Similar to S2, but tuned to observe ocean properties and behaviour
  • Sentinel-4: High-orbiting sensor to measure atmospheric gases
  • Sentinel-5: Low-orbiting atmospheric sensor to help monitor air quality
  • Sentinel-6: Future version of the long-running Jason sea-surface height series

What is the Copernicus programme?

  • EU project that is being procured with European Space Agency help
  • Pulls together all Earth-monitoring data, from space and the ground
  • Will use a range of spacecraft - some already up there, others yet to fly
  • Expected to be invaluable to scientists studying climate change
  • Important for disaster response - earthquakes, floods, fires etc
  • Data will also help design and enforce EU policies: fishing quotas etc
Image copyright Copernicus Sentinel data/ESA
Image caption Sentinel-2A's picture of Lake Amadeus in Australia's Northern Territory

Jonathan.Amos-INTERNET@bbc.co.uk and follow me on Twitter: @BBCAmos

12 ways to introduce your kids to their new best friend: science

Dear parents,

Video games and basketballs are awesome and all, but let's not pretend they inspire the same awe for the world as your best buddy science. Remember when you were a child and you’d build your own volcano in the kitchen? How about the magic of growing your own multi-colored crystals? It blew your mind. This weekend, introduce your kids to the seriously cool stuff: let them play with robotics, excavate "dinosaurs," or learn the basics of physics.

Find our ideas below. Go on. You won't regret it.


With all our product stories, the goal is simple: more information about the stuff you're thinking about buying. We may sometimes get a cut from a purchase, but if something shows up on one of our pages, it’s because we like it. Period.

A mystery with a shocking twist: Death by indoor lightning

Caution: This article contains descriptions __that may be disturbing to some people.

Recently, in an undisclosed place and time, police wandered onto a grisly and unusual scene.

That day, a 53-year-old man had been renovating his cottage alone when he stopped answering his phone. His family, growing worried, called the police, who showed up at the man's door.

Inside, they found his corpse lying between two metal sawhorses, badly burned. But there was no evidence of fire anywhere else in the house, and no sign of an electrical malfunction, leading investigators to wonder whether the man had been burned elsewhere and then hidden in the cottage. But a closer look indicated __that this death was much more unusual. The case is detailed in the American Journal of Forensic Medicine and Pathology.

Seventy percent of the man's body was covered in first-, second-, and third-degree burns, his clothing and hair singed, while other parts appeared untouched. There was an especially bad burn on his left foot, and the skin was broken on his right thumb, which also showed a yellow discoloration. His airways did not contain soot. Instead, he bore evidence of heart failure.

Taking a look around at the steel beams that protruded from the central area of the cottage to the outside of the house, and the metal tools scattered about the man, the investigators put two and two together. These burns weren't caused by fire. Instead, a lightning bolt must have travelled down the beams, arcing across the metal tools. The electricity entered the man's body through his left foot, and exited through his right thumb after passing through his heart.

Meteorologists confirmed a thunderstorm had passed through the area a few hours earlier, right around the estimated time of death.

Flash of insight

Death by lightning is rare. Death by lightning while indoors is even more rare.

Eight million flashes of lightning streak across the sky each day, but only about 35 Americans a year are killed by lightning strikes. The vast majority of those strikes happen while the victim is outdoors. Indoor lightning strikes, when they do occur, are usually related to using a phone during a storm, and they're rarely deadly.

When a storm's coming, the Centers for Disease Control and Prevention recommends that you go indoors and stay away from electronic equipment, corded phones, and water. And if you live in a house with exposed steel beams, it might be worth staying away from those as well.

Life before the EPA, a rocket in the Aurora Borealis, and more amazing images of the week

Ancient skulls give clues to China human history

Lingjing skulls Image copyright Xiujie Wu
Image caption The skulls provide insights into the predecessors of modern humans in the region

Two skulls found in China shed light on the ancient humans who inhabited the region before our own species arrived.

We know __that Europe and western Asia was dominated by the Neanderthals before Homo sapiens displaced them.

But remains belonging to equivalent populations in East and Central Asia have been scarce.

It's unclear if the finds are linked to the Denisovans, a mysterious human group known only from DNA analysis of a tooth and finger bone from Siberia.

Prof Erik Trinkaus, one of the authors of a study on the remains in Science journal, said it was not possible to say at this stage whether the ancient people from Xuchang were connected to the Denisovans.

"The issue here is the patterns of variation and the population dynamics of 'archaic' populations during the later part of the Pleistocene," Prof Trinkaus, from Washington University in St Louis, told BBC News.

Modern humans (Homo sapiens) originated in Africa some 200,000 years ago before expanding out across Asia, Europe, Oceania and the Americas after 60,000 years ago. As they spread across the world, they displaced the existing populations they encountered, such as the Neanderthals and Denisovans - but some limited interbreeding occurred.

The partial skulls from China are between 105,000 and 125,000 years old and lack faces. But they show clear similarities to and differences from their Neanderthal contemporaries in the west.

Ancient links and common trends

"There's a certain amount of regional diversity at this time, but also there are trends in basic biology __that are shared by everybody. And the supposed Neanderthal characteristics show that all these populations were interconnected," Prof Trinkaus explained.

Prof Trinkaus, Zhan-Yang Li, from the Chinese Academy of Sciences in Beijing, and others found that the specimens show some characteristics, like a low, broad braincase, that link them to even earlier humans from the same region, who lived in the Middle Pleistocene.

Image copyright Science
Image caption Xuchang 1 has a "remarkable" brain size

But some features of the skull that were more pronounced in earlier humans, such as the bony ridges over the eyes and a bony prominence at the back of the skull called the nuchal torus, are not as marked in these specimens. Erik Trinkaus says this represents evidence for a process of "gracilisation" - a reduction of bone mass through evolution - that was common to other human groups at the time.

And the two specimens from Xuchang have comparatively large braincases - reflecting a trend towards larger brain sizes across the Old World - Europe, Africa and Asia.

DNA solution?

One of the ancient Chinese skulls - Xuchang 1 - is at the high end of the scale. Prof Chris Stringer, from London's Natural History Museum, who was not involved with the study, said the individual had a "remarkable brain size, up there with the largest known Neanderthal and early modern examples".

As regards any potential relationship with the Denisovans, he said: "Unfortunately, the skulls lack teeth so we cannot make direct comparisons with the large teeth known from Denisova Cave, but another similarly-dated fossil from Xujiayao in China does have Neanderthal-like traits in the ear bones, like Xuchang, and does have large teeth, so these may all represent the same population.

"From genetic data, the Denisovans are believed to have split from the Neanderthal lineage about 400,000 years ago - about the time of the Sima de los Huesos early Neanderthals known from Atapuerca in Spain. So one might expect some level of Neanderthal features in their morphology, added to by evidence of some later interbreeding with the Neanderthals.

"We must hope that ancient DNA can be recovered from these fossils in order to test whether they are Denisovans, or a distinct lineage."

The skulls were found during excavations at Lingjing, Xuchang County in Henan Province, between 2007 and 2014.

Follow Paul on Twitter.

Technology

Red squirrels: Volunteers wanted to save species

Red Squirrels face pressure for food Image copyright Christine Cassidy
Image caption Red Squirrels face pressure for food

Volunteers are being sought to survey 120 woods in Northern Ireland for a protected mammal.

They are being asked to help gather information about red squirrels.

Experts claim that, without intervention, the animals could be extinct with 35 years.

Grey squirrels out-perform reds for food and carry a disease __that can kill them. They have spread rapidly since their introduction a century ago.

The volunteers will be trained to monitor feeders and set up camera traps to record sightings as part of a conservation programme.

And they will be asked to report greys in areas which are currently strongholds for reds.

Workshops are being organised by Ulster Wildlife in March to train the volunteers.

The data gathered will contribute to the work of Red Squirrels United, a UK-wide network set up to protect the endangered species.

Image copyright Craig Shuttleworth
Image caption Map showing spread of grey squirrels

Conor McKinney from Ulster Wildlife is leading the project in Northern Ireland.

He said numbers of red squirrels had "declined dramatically" since greys were introduced to Ireland in 1911.

"To ensure __that future generations can continue to enjoy these special animals, we need volunteers to help us monitor squirrels in their local area, so we can target our conservation efforts," he said.

Reds are currently found in the Mournes, south and west Tyrone, parts of County Londonderry, the Glens of Antrim and Fermanagh.

Experts believe there are only about 140,000 red squirrels left in the UK.

The project is being supported by the Heritage Lottery Fund.

McDonalds' fancy new straw doesn't suck

The phrase "reinventing the wheel" usually means someone is wasting time and effort trying to fix something __that isn't broken. The same could be said for reinventing straws, which is something __that McDonald's has half-jokingly tried to do with its new STRAW (Suction Tube for Reverse Axial Withdrawal).

On February 24, the fast food corporation will be giving out 2,000 J-shaped, holey straws in select locations across the country, and they're only good for one thing:

"This straw has no purpose other than allowing you to drink a milkshake that has two distinctive layers," says fluid dynamicist Nicole Sharp. She runs a blog called F**k Yeah Fluid Dynamics that highlights awesome examples of flowing fluids in the world around us, so we reached out to her to get her thoughts on the new straw design.

"Me and my friend that I'm staying with—an MIT professor—we watched the McDonalds' video laughed a lot," she says.

And that is mostly the point, it seems. A McDonald's press release admits it's an "utterly frivolous reinvention" designed for the new milkshake they're touting—a two-layered chocolate and mint concoction.

Still, many of us here at Popular Science are recovering scientists, so Commerce Editor Billy Cadden and I decided to test it out.

Why not use a straight straw?

Let's be clear about something: if you want customers to be able to taste two flavors at once, the most practical thing to do would be to blend the two flavors together. But if that results in an ugly green-brown color—or if you want to make a splash in the media—another option is to stack the two flavors in layers. Très chic!

Now, a regular, boring old straw with just one measly hole at the end will not allow you to taste both of those layers at once. So what's a brand to do? Call in some rocket scientists and robotic engineers to design a new type of eating utensil that will mix the two flavors together as the person drinks. (Because, again, stirring things with spoons is just too straightforward.)

The rocket scientists probably knew that a straight straw with two holes in it wouldn't work very well. If you've ever tried to use a straw with a hole in it, you know why, says Sharp. "It works fine until the top hole is exposed—then all you get is air."

The genius of the J-shaped design is that the hole nearest the mouth of the straw sits at the very bottom of the cup, so it should always be pulling from the delicious bottom layer of the milkshake. Meanwhile, holes punched along the shorter arm simultaneously draw from the top layer, allowing you to drink two flavors at once without sucking in a bunch of air. Theoretically.

Plus, the longer J-shaped straw provides more distance for the flavor to mix over, says Sharp.

The iPhone of straws

The employees at our local McDonald's gathered around to admire our straw. I don't know about Billy, but I felt pretty fly sliding it out of its box as if I were unveiling the new iPhone, to the admiration and curiosity of the crowd.

We asked our cashier to make two milkshakes: one with the chocolate and mint layered, to test out the J-shaped straw, and one where the chocolate and mint were blended together with a spoon—we sampled that one with an old-fashioned straight straw. We wanted to see whether there was any point to the layered milkshake (and therefore the straw). We suspected that there was not.

Billy, who is slightly less lactose intolerant than I am, was the lab rat. Here is our scientific report:

"More sucking power is needed."

First, the test subject started with the layered milkshake, which had mint on the bottom and chocolate on the top. First reaction: "It's good." Second reaction: "It's a lot mintier than I was expecting. I don't know if the top hole [positioned in the chocolate later] is working as well as the bottom hole [in the mint layer]."

The subject reported tasting about 80 percent mint, 20 percent chocolate in those first few sips. That's a far cry from the 50/50 ratio that Micky D's was aiming for. For customers who like mint, this may be desirable. However, our test subject preferred the blended milkshake, which was more like 40 percent mint and 60 percent chocolate.

Over time, as the layered milkshake began to melt and mix together, it began to taste similar to the blended milkshake.

From the beginning of the test, the J-shaped straw was "a lot harder to drink from," our test subject reported. "More sucking power is needed." This may have been because the J-shaped straw is longer, which meant the milkshake made more contact with the straw walls, which would increase friction, according to Sharp.

Things started to go downhill rather quickly as the milkshake level went below the first set of holes cut into the side of the straw's shorter arm. When the test subject attempted to drink more, the straw made a hollow slurping sound as if he were trying to suck up the last dregs of a milkshake, despite the fact that approximately half of the milkshake remained in the cup.

After allowing the milkshake to melt a little, the test subject tried again, but to no avail. Eventually, he gave up and used a regular straight straw to finish the milkshake, and the experiment ended.

Why didn't it work?

You'd think that because the hole closest to the mouth of the straw is buried in milkshake, you could still get a mouthful of sugar even after the holes on the short end of the straw are exposed to air. But something else is clearly going on. Sharp has a hypothesis as to why the STRAW crapped out on us, but she cautions that she hasn't tested it yet.

She suspects a Saffman-Taylor instability may be forming in the straw. Essentially, that's when a less viscous fluid (like air) intrudes on a more viscous fluid (like milkshake). Basically, the air may be beating the milkshake to the mouth because it flows so much easier.

Conclusion and discussion

If it worked properly, the J-shaped straw would allow you to determine the optimal flavor ratio for your layered milkshake. Like more mint? Move the straw more into the minty layer. Or the flavor of your milkshake could evolve as you depleted one layer more than the other.

In practice, though, the straw did not achieve an even mixing of flavors, and it stopped working about two-thirds of the way through the milkshake. Our experiment, did, however, only have a sample size of one. More research, and more milkshakes, are needed to determine the validity of this design.

Want people to volunteer as lab rats? Turn your science into a game.

The following is an excerpt from Power Play: How video games can save the world by Asi Burak and Laura Parker.

One of the most successful examples of citizen science is Lab in the Wild, an experimental platform for conducting online behavioral experiments. It was launched in 2012 by Krzysztof Gajos, an associate professor of computer science at Harvard University’s School of Engineering and Applied Sciences, with the help of one of his postdoctoral researchers, Katharina Reinecke. The platform administers game-like tests online to unpaid volunteers. At the time of launch, Gajos was interested in observing how humans interact with computational systems, particularly how online interfaces can better accommodate people’s varying abilities to see, hear, and interact.

Lab in the Wild launched with three studies, the most successful of which asked participants to rate a number of websites, on a scale of 1 to 9, based on visual appeal; more than 40,000 people from some 200 countries participated in the study, varying in age from 6 to 99. “We had everyone from scientists to plumbers take part,” Reinecke said. The results of the study supported Reinecke’s theory __that what users perceive as “good” design is subject to individual and cultural preferences. For example, the level of colorfulness and visual complexity people prefer varies wildly: according to the study, women like colorful websites more than men, while a highly educated person generally prefers less color. Russians prefer lower visual complexity, while Macedonians like highly intricate designs. Later, Gajos and Reinecke published a paper on Lab in the Wild, in which they compared three experiments performed on the platform with similar studies done inside the lab, concluding __that the online results replicated the in-lab studies with “comparable data quality.” They concluded: “In comparison to conventional in-lab studies, Lab in the Wild enables the recruitment of participants at larger scale and from more diverse demographic and geographic backgrounds.”

Some people would argue that games like Foldit and the activities found on Testmybrain.org and Lab in the Wild aren’t really games. Not in the traditional sense, anyway. Few people would choose to play Foldit over Tetris based on technical elements and entertainment value, for example. But that doesn’t necessarily exclude Foldit and the others from the category of games. The boundaries of game design have been slowly shifting and stretching over the last five years to include more experimental and innovative projects. Could a game like Foldit be better designed? Undoubtedly. But the fact that the game needs to deliver on a very specific objective—in this instance, a scientific one—limits what the game can be in the end, and it’s therefore hard to say how much better, from a pure gaming standpoint, it could be.

However, if these games could be designed to be more entertaining, that would certainly increase their impact, because even more people would want to play them. “I don’t want my documentary to be boring. It may have to be boring in parts to make a point, but that’s never the goal,” said Nicholas Fortugno, lead designer of the wildly popular game Diner Dash and the co-founder of the New York City–based game development studio Playmatics. “Better design makes better games, and the better the game is, the more it’s played. If the game has social impact, then of course you want it played as much as possible. The fact that a lot of people played it is a triumph that shouldn’t be overlooked, but it didn’t live up to its potential if better design would let [even] more people access it.”

Fortugno believes that many of these games would benefit from the touch of a professional game designer. This isn’t to say that good games never come from amateurs—rather, that game expertise can make a game more appealing. Whether the games should be commercial is a different question. “I think that the question of money has little to no bearing on how fun the experience is. A good, serious game should make the high-end goal itself fun to achieve through [its] mechanics.”

Reinecke didn’t go out of her way to attract people to Lab in the Wild; instead, participants had the option of sharing the results of their tests online, which many did, inspiring others to take the test. Today, the site averages around 1,000 participants per day. There are usually only six to nine studies live on the site at any one time; researchers can submit their studies for preapproval, after which Lab in the Wild posts the studies to its Facebook page and asks users for their feedback. If the response is positive, the study goes up. The only rule is that studies have to be fun, simple, and shareable. One of the site’s most popular studies was a test that guessed users’ ages based on their clicking speeds; it attracted more than a million participants in its first two months. The site also provides users with personalized feedback, allowing each participant to compare him or herself with users in other countries. This is probably why Lab in the Wild has had so much success on social media—currently, the majority of the site’s traffic comes from Facebook. (The top user countries are usually the United States, the United Kingdom, Canada, Romania, and Hungary.) “I know of other successful citizen science and crowdsourcing projects where the people involved are really in it to help the world,” Reinecke says. “With us, it’s the opposite. It’s less about altruism, and more about personal motivation— but hey, whatever works, right?”

Excerpt from Power Play: How video games can save the world by Asi Burak and Laura Parker. Copyright © 2017. Available from St. Martin's Press Popular Science is delighted to bring you selections from new and noteworthy science-related books. If you are an author or publisher and have a new and exciting book that you think our readers would love, please get in touch! Send an email to books@popsci.com.

McDonald's new science straw, a head-tripping optical illusion, and other amazing images of the week

Middle Eastern seed bank re-deposits backups into Svalbard's doomsday vault

Today, the seeds of 49,000 varieties of crops—including cabbages, wheat, lentils, sweet peas, and many others—will be wheeled into a vault in a mountainside. There they will lay in in sturdy black plastic boxes in a frigid underground vault high above the Arctic Circle, an insurance policy for the entire world’s food supply.

Remarkably, some of the packets being deposited today are descendants of seeds __that were removed in 2015, when the remnants of a Syrian-based seed bank withdrew the first seeds from the Svalbard vault, in order to re-establish crops lost during civil war.

Svalbard Seed Bank

The Svalbard seed bank is nine years old, and is located at the ends of the Earth, in Svalbard, an island in Norway far above the Arctic Circle. The low temperatures will help keep the seeds safe for decades, if not centuries. The vault holds 930,821 varieties of agricultural crops from around the world, with a mission to preserve the biodiversity of plants used in agriculture.

“This natural resource is too important to be left to uncertainty,” says Marie Haga, executive director of Crop Trust, the nonprofit __that operates the seed bank.

Seeds from thousands of varieties of wheat, rice, vegetables, grasses, and other crops from all around the world rest on the shelves, all backup copies for national and international seed banks just like this located around the world.

While the national seed banks constantly use seeds for research and to provide farmers with seeds for crops, these seeds' main purpose is to sit and wait, ready to be recalled by those national groups in case one of their samples is destroyed.

“Losing a sample means extinction, and extinction means losing a trait that might have been essential to the evolution or adaptation of the crop in the future,” Cary Fowler, agriculturist and senior advisor to the trust says.

With a changing climate increasingly threatening farmers with unusual temperatures and water availability, farmers are looking for hardy, high yield crops. In addition to changing climate, food producers the world over must continue to grow food for an expanding human population while fighting salinity levels in soil, migrating pests and diseases, and myriad other threats, including armed conflict.

In those circumstances, having a backed up library of genetic traits from all around the world means more options for an uncertain future. And in at least one case, the seed bank has already proven its usefulness.

First Withdrawal

When the Arab Spring began in Libya in 2011, Fowler called up the head of a seed bank in Syria and asked if he might consider putting some of their already prepared duplicate copies of their seeds into the Svalbard repository. Initially, the counterpart said that Syria was so stable, that it wasn’t immediately necessary. Fowler, who had seen the gleaming state-of-the-art facilities there agreed that it was incomprehensible that anything should happen there.

“I said yeah, I’m sure you're right, but just in case.” Fowler is quiet for a moment, remembering the war that broke out in Syria soon after that telephone call in 2011. “Just in case pretty much summed up why we had a seed vault,” he says.

Even though initially it didn’t look like the unrest in the Middle East would reach Syria, the regional seed bank, the International Center for Agriculture Research in the Dry Areas (ICARDA) took Fowler up on the insurance policy. Just in case.

In Fowler’s words, “just before all hell broke loose” in Aleppo, and the seed bank there shut down, the last shipment of duplicate seeds made it safely to the seed bank in Svalbard. Then, in 2015, ICARDA re-established itself in Morocco and Lebanon, and asked for its seeds back, the first withdrawal from the seed bank.

“They have lot of diversity of those crops that are very important if you want to have a heat or drought tolerant varieties,” Fowler says.

Now, less than two years later those seeds have helped re-establish that critical seed bank, and copies are being transferred back into the Svalbard seed bank as an insurance policy that everyone hopes they will never need to use again.

Funding ‘Just In Case’

“It only takes 34 million United States dollars [per year] to conserve the diversity of the major crops in the world,” Haga says.

That money goes to support 11 national and international collections of seeds, informational systems to tie together the system, and of course the seed vault in Svalbard *. It takes electricity, and therefore, money, to cool the vault to precisely 18 degrees Celsius. That’s easier in the frigid climate above the Arctic Circle, but still takes energy to keep the temperatures consistently low. Other money is needed to transport seeds from around the world into (and out of) the vault, a process that happens only a few times a year to minimize temperature fluctuations in the seed bank.

The money comes from an independent endowment still in the process of being funded. “A modern soccer stadium costs more than a billion dollars,” Haga says. By comparison, she estimates that the $34 million needed to run the seed bank annually could be generated by a $850 million endowment invested conservatively over time. “We can afford that,” Haga says.

Fundraising efforts for the 9-year-old seed bank are underway, to ensure that the mission keeps going for years to come. One partnership with camera company GoPro produced the short documentary below, showing an inside look into what the seed vault is and why it operates. They hope to raise awareness and add more money to the $170 million already in the endowment.

Haga knows that many people have never thought about the biodiversity of the world’s crops. But she is unequivocal about the importance of biodiversity in agriculture for every human on the planet.

“For heaven's sake, it's about your breakfast and your lunch and your dinner. You want it to be the food that you want and you want there to be enough of it,” she says.

Whether natural or human disaster, Haga and Fowler hope that the worst will never occur, but they want to be ready when it does.

“I would love to go down in history as being involved with one of the greatest boondoggles in history that ever was.” Fowler laughs before becoming serious again. “You never want an insurance policy to be used.”

But, he adds that rosy vision of the future is unlikely to unfold. “My guess is that in the future we’ll be returning more seeds more often.”

  • Update 2/23: This article has been updated with more details about how the money in the Crop Trust budget is allocated.

Black holes might devour stars much more often than we thought

Most galaxies in the universe have at least one thing in common: supermassive black holes tend to sit in their centers, silently gorging on interstellar gas and dust and obliterating anything __that comes within range of their event horizon. But scientists know very little about the origin of these behemoths or how they got to be so supermassive.

"We don't understand particularly well how black holes grow," says James Mullaney of the University of Sheffield. "Especially how they grew back in the early universe, when the first stars were starting to form."

But Mullaney and his colleagues may have accidentally stumbled upon a major clue.

In a study published Monday in Nature Astronomy, they report evidence __that black holes might tear apart and "consume" entire stars much more commonly than was previously assumed.

"The results came out purely by chance really, quite like a lot of scientific discoveries," Mullaney says. "We were initially looking to find out what happens when galaxies collide."

But when his team observed 15 galaxies in 2015, they noticed that one of them had changed since a previous survey in 2005. They saw a strong flash of light—the fingerprint of a Tidal Disruption Events, or TDE. It sounds like something a surfer might grouse about, but a TDE is when a star strays too close to a black hole and gets totally torn apart. It's lights out for the star and dinner time for the black hole.

A TDE isn't inherently surprising. But finding it in a random batch of 15 galaxies was pretty strange. "Until now, such events have only been detected by surveying thousands or tens of thousands of galaxies," Mullaney explains. "And even then, you might not always find one."

Of course, it's possible the team just got really, really lucky. But Mullaney says they've calculated the odds of such an event being purely due to chance, and they found them to be something like one in 100. What's more likely, he explains, is that they've stumbled upon a circumstance—galaxy collision—that makes TDEs happen more frequently.

"It’s a little bit like if you surveyed a population of non-smokers—you might only identify that one had lung disease in a pretty large group. Whereas if you sampled a population of smokers, you’d find one in fifteen had lung disease, because smoking causes lung disease," he says. "We found one of these events taking place in a much smaller group than we'd expect," so it seems likely that colliding galaxies are at risk for TDEs in the way that smokers are more likely to have lung disease.

More research is needed, especially since there is the possibility—however slight—that Mullaney's team simply got really lucky. But the group hopes to look at many more colliding galaxies in the hopes of raising their confidence level. If they really have landed on something that makes a TDE more likely to occur, they should be able to find loads more.

"It's not going to affect the human race or anything like that," Mullaney says. "But it could help us finally understand how these black holes are growing."

It's generally been assumed that black holes consume interstellar gas and dust for the most part—not stars themselves. But Mullaney now believes black holes could get as much as a quarter of their bulk from swallowing stars. "If these events are happening as frequently as our study suggests," he says, "then actually swallowing stars suddenly becomes a feasible way for black holes to grow."

New UN climate chief: 'Action on warming unstoppable'

Trump Image copyright Getty Images
Image caption President Trump's attitude to climate change has drawn protests in many parts of the world

The UN’s new climate chief says she’s worried about President Donald Trump - but confident __that action to curb climate change is unstoppable.

President Trump said he’d withdraw from the UN climate deal and stop funding the UN’s clean energy programme.

But former Mexican diplomat Patricia Espinosa told BBC News __that the delay in any firm announcement suggests the issue is still unresolved.

She travels to US this weekend to try and meet the new US secretary of state.

'World will carry on'

Ms Espinosa said it would be more damaging for the US to leave the on-going climate talks process altogether than to stop funding the clean energy programme.

Image copyright Getty Images
Image caption New UN climate chief Patricia Espinosa on the left with her immediate predecessor Christiana Figueres

The US pays approximately $4m (£3.2m) towards this programme every year - and often an extra $2m in voluntary funding.

But she said the rest of the world would carry on tackling climate change without the US, if necessary.

She said China’s stated willingness to lead the world in curbing emissions might cause American diplomats to ponder the implications of allowing China a role of global moral leadership.

“We are of course worried about rumours that the possibility of the US pulling out of the Paris agreement and the convention on climate change,” she said.

“It would be very bad if there were a change of position in the US. That’s why I’m looking forwards to engaging with the US as a partner.”

She did not explain how the US would be able to remain within the Paris framework whilst scrapping action on its own emissions strategy that helps underpin that process.

Embracing green action

But she drew hope from the vast number of firms and cities looking towards a low-carbon future - in the US and around the world: "A lot of US businesses are really going into the agenda of sustainability and some are making their own commitments in emissions reductions in their own operations."

“An incredible amount of cities have embarked on ambitious goals; some states like California have been for many years in the forefront of this agenda.

“In International Petroleum Week, I was very encouraged to hear how much some of the oil and gas companies are realising that the future of their industries is in a transformation into clean energy companies - and they have embraced this in their own interest.

“The transformation has started. I think it’s unstoppable.”

Ms Espinosa smiled at the irony of dealing with Mr Trump as a Mexican, a woman, and someone who works in climate change.

She said her trip to the US would include meeting businesses and civil society groups and - hopefully - a senior member of the administration. She is anticipating a meeting with the new secretary of state Rex Tillerson.

The former CEO of the oil giant Exxon Mobil warned recently that climate change is a genuine risk, and said the US should stay at the table of UN talks.

Other nations have responded differently to the new situation presented by Mr Trump. China has offered to lead and India has surprised many with its new level of ambition.

Saudi Arabia has expressed support for a slower rate of decarbonisation and Russia - the fifth largest emitter - has not yet ratified the climate deal from Paris.

Follow Roger on Twitter @rharrabin.

Where should we look for alien life?

Interstellar publicity still Image copyright Warner Bros
Image caption In the film Interstellar, astronauts leave Earth in search of other habitable planets

Astronomers have discovered a small planet around Proxima Centauri, the closest star to the Sun. But how do astronomers decide whether a planet is hospitable to life?

In the science fiction film Interstellar, astronauts leave a dying Earth in search of a hospitable planet for the human race to settle.

But the first two worlds on their shortlist - deemed "potentially habitable" from a distance - turn out to be nightmarishly hostile on closer inspection. The crew's first stop is an ocean planet lashed by 1km-high tidal waves, while the second is a deep-frozen world choked by toxic ammonia.

While Christopher Nolan's movie is fantasy, it draws on a real-life aspect of the work done by astronomers who study exoplanets - worlds beyond our Solar System.

The search for planets capable of supporting life could answer an age-old question: are we alone in the Universe? But what do astronomers mean when they refer to distant worlds as potentially habitable, or Earth-like?

Earth-sized planet orbits neighbouring star

"When we say 'potentially habitable' exoplanets, that's a term __that refers to measurable qualities of a planet __that are necessary for habitable conditions," says Prof Abel Méndez, from the University of Puerto Rico (UPR) at Arecibo.

These are, then, promising targets where nothing is guaranteed. But two criteria dominate popular discussions of planetary habitability: first, whether it is within Earth's general size range (and therefore has a chance of being rocky) and, second, whether it resides in what's known as the habitable - or Goldilocks - zone.

This is the range of distances around a host star where there's just enough starlight to keep water in liquid form on a planet's surface. Too close to the star, and the heat will cause water to boil off; too far away and any water will freeze.

These are useful rules of thumb, but a host of factors influence how hospitable planets are. And some are excluded from the conversation because of limitations in technology.

Image copyright OLIVIER MORIN/Getty
Image caption Scientists believe the protective magnetic field around our planet plays a vital role in sustaining life

"As we learn things about what makes the Earth habitable, things like the magnetic field become really important," says Prof Don Pollacco, who researches exoplanets at the University of Warwick.

"We can't measure the magnetic field of an exoplanet, so we just forget about it."

But other measurable properties are relevant to the life question. To begin with, most "potentially habitable" exoplanets orbit red dwarfs, the name for a category of stars that are smaller, cooler and dimmer than our Sun.

Red dwarfs are the most numerous star type - making up some 75% of stars in our galaxy - but that's by-the-by. The main reason they predominate is that it's easier to find low-mass planets there.

Astronomers hunt for exoplanets in two principal ways: the radial velocity - or wobble - method relies on detecting the gravitational pull a planet exerts on its host star, while the transit method makes use of the dip in brightness when a planet crosses in front of its star.

Image copyright NASA
Image caption The transit method for detecting exoplanets uses the dip in brightness when a planet crosses the face of its star

For the wobble method, it's easier to detect a small planet tugging on a similarly small star, than tugging on an object many times its size.

In the transit method, a small exoplanet passing in front of a small red dwarf blocks out more of that star's light, while the signal of an Earth-sized world passing in front of a bigger, brighter Sun-like star will be drowned out by its glare.

But because red dwarfs are dimmer than the Sun, planets need to be located closer in order to receive sufficient energy for water to pool.

The nearer a planet is, the stronger the tidal forces exerted by the host star. This can cause the world to be tidally locked, which means the time it takes to spin on its own axis equals the time taken to complete a revolution of its star. Tidally locked planets always present the same side towards their stars.

Image copyright NASA
Image caption The cooler the star, the closer in their habitable zones have to be

The Moon is tidally locked to the Earth, explaining why we always see the same "face". Unlike the Moon, planets tidally locked to their stars would have a permanent day side and a permanent night side.

"The only way heat can get to the cold side is either through the planet itself or through an atmosphere if it has one. Some people have postulated - if it's hot on one side and cold on the other, somewhere in the middle there must be a temperate zone," Don Pollacco explains.

"Stand five feet one side and you get fried, stand five feet the other side and you freeze," he jokes.

A range of opinions exist on the likely effects of tidal locking on habitability. But lower mass stars tend to be more violent and unpredictable than their more imposing counterparts.

Prof Pollacco and colleagues from Warwick, Queen's University Belfast and Denmark's Aarhus University have studied some of the habitable systems discovered by Nasa's Kepler space telescope.

Image copyright Casey Reed/NASA
Image caption Superflares: Nothing to do with Saturday Night Fever

They found that one host star, Kepler -438, produced "superflares" - bright outbursts which can hurl torrents of charged particles into space. Scientists think these giant eruptions could strip away the atmospheres of nearby planets and barbecue any life that happened to be on the surface.

But Don Pollacco comments: "On Earth, we have life in rocks and 20,000ft under the sea… If you're that much closer to a major flare, you're going to know about it. What that means is you have to evolve in a different way."

"We've got one system we know where life is and we're using that as our exemplar... but we have used this reasoning before and found things we didn't expect to find. Going in armed with a vision of life as it is here on Earth is likely to be wrong."

Dr Jon Jenkins, a co-investigator on the Kepler mission, echoed this view, saying the jury was still out on whether life was more likely to arise in the habitable zones of low-mass stars or those of brighter stars like the Sun.

"In the search for life we really need to be turning over every rock, to see what crawls out," he told BBC News.

Image copyright Gaetan Borgonie, Nature Comms
Image caption Life forms that can tolerate conditons deep in the Earth may provide clues to biology elsewhere in our galaxy

Prof Abel Méndez, who leads the Planetary Habitability Laboratory at UPR, says the new planet around Proxima Centauri - which is a red dwarf star - could act as a testbed for different theories.

"If we eventually find out that these stars are so bad for life, it means that 75% of stars in our galaxy are no good… That's useful to know."

But not all the potential targets for life orbit dim, low-mass stars. In 2015, Nasa announced the discovery by Kepler of a planet somewhat larger than Earth orbiting a star belonging to the same class as the Sun, and with an orbital period very similar to that of our own planet - 385 days.

It's not surprising many think Kepler-452b is the closest match to Earth yet, but Dr Jenkins says the team had to work hard to make their detection.

First, they had to account for data "noise" coming from their sample of Sun-like stars, which turned out to be twice as active as expected. But they also had to contend with interference in the images, which was caused by the way the telescope's main instrument responded to the heat environment aboard the spacecraft.

Image copyright ESO / M. Kornmesser
Image caption Proxima Centauri b could act as a testbed for theories regarding habitability around red dwarfs

While planets in the habitable zones of Sun-like stars are difficult to detect at present, in time astronomers will almost certainly be able to study a large sample of such systems.

This will be made possible by the suite of ground-based and space-based observatories set to go online in coming decades, including the Europe's PLATO mission, Nasa's James Webb Space Telescope and the European Extremely Large Telescope (E-ELT) in Chile.

"It's quite breathtaking to think that 30 years ago - when I was in college - the notion of just detecting an extrasolar planet seemed like science fiction," says Dr Jenkins, from Nasa's Ames Research Center in California. "It's going to be very exciting to see what unfolds in the next 30."

One approach to finding life with the next generation of instruments is to look for gaseous signatures of biology in exoplanet atmospheres - something Abel Méndez calls "the big next step".

Image copyright NASA
Image caption The James Webb Space Telescope could revolutionise our understanding of exoplanets

He says this might allow us "not only to say that the planet is habitable, but also say that it is inhabited". Prof Méndez thinks a signature of oxygen and methane from a habitable zone planet could provide tantalising hints of biology, but says it won't be enough to claim a discovery.

However, a tell-tale sign of life that astronomers can agree on is the presence of gases produced only by artificial means - pollution, in other words. Prof Pollacco calls this "demoralising", but explains: "It must indicate something - probably a technologically capable society."

It's sobering to think that our first indication of intelligent life could come from a civilisation in the process of ravaging its own planet. But there's an upside according to Don Pollacco.

"There'll be someone to talk to eventually that we have something in common with."

Follow Paul on Twitter.