Connect with us

The Conversation

4 reasons why the US might want to buy Greenland – if it were for sale, which it isn’t

Published

on

theconversation.com – Scott L. Montgomery, Lecturer, Jackson School of International Studies, University of Washington – 2025-01-14 07:48:00

Scott L. Montgomery, University of Washington

President-elect Donald Trump has sparked diplomatic controversy by suggesting the U.S. needs to acquire Greenland for reasons of “national security” and refusing to definitively rule out using military force to do so. Greenland, a self-governing Danish territory, “is not for sale,” said Denmark’s prime minister, Mette Frederiksen.

Trump’s interest in Greenland is not new. He first expressed interest in the territory in 2019, but it never developed into any action.

Whether or not Trump has actual plans this time around to advance any attempt in Washington to own Greenland is far from clear. But given the incoming president’s repeated statements and invocation of national security, it’s worth considering what strategic value Greenland might actually have from the perspective of the U.S.’s geopolitical priorities.

As a scholar of geopolitical conflicts involving natural resources and the Arctic, I believe Greenland’s value from an international political perspective can be viewed in terms of four fundamental areas: minerals, military presence, Arctic geopolitics and the territory’s potential independence.

A matter of minerals

Greenland’s most valuable natural resources lie with its vast mineral wealth, which holds real potential to advance its economy. Identified deposits include precious metals such as gold and platinum, a number of base metals – zinc, iron, copper, nickel, cobalt and uranium – and rare earth elements, including neodymium, dysprosium and praseodymium. A detailed 2023 summary published by the Geologic Survey of Denmark and Greenland suggests new deposits will be found with the continued retreat of the Greenland Ice Sheet.

Greenland’s rare earth resources are particularly significant. These elements are essential not only to battery, solar and wind technology but also to military applications. If fully developed, the Kvanefjeld – or Kuannersuit in Greenlandic – uranium and rare earth deposit would place Greenland among the top producers worldwide.

During the 2010s, Greenland’s leaders encouraged interest from outside mining firms, including leading Chinese companies, before finally granting a lease to the Australian company Energy Transition Minerals (formerly Greenland Minerals Ltd).

When China’s Shenghe Resources took a major share in Energy Transition Minerals, it raised red flags for Denmark, the European Union and the U.S., which felt China was seeking to expand its global dominance of the rare earth market while reducing Europe’s own potential supply.

The issue was put to rest in 2021 when Greenland’s parliament banned all uranium mining, killing further development of Kvanefjeld for the time being. That same year saw the government also prohibit any further oil and gas activity. Predictably, a majority of mining companies have subsequently steered clear of Greenland due to perceived concern of any investment being jeopardized by future political decisions.

Fears of China abroad

China’s interest in Greenland stretches back at least a decade.

In 2015, Greenland Minister of Finance and Interior Vittus Qujaukitsoq visited China to discuss possible investment in mining, hydropower, port and other infrastructure projects. One firm, China Communications Construction Company, bid to build two airports, one in the capital, Nuuk, the other in Ilulissat.

Another Chinese firm, General Nice Group, offered to purchase an abandoned Danish naval base in northeastern Greenland, while the Chinese Academy of Sciences asked to build a permanent research center and a satellite ground station near Nuuk.

None of this sat well with the first Trump administration, which put pressure on Denmark to convince Greenland’s government that a significant, official Chinese presence on the island was unwanted. The Danes and Greenlanders complied, rebuffing Chinese attempts to invest in Greenland-based projects.

The Trump administration, in particular, viewed China’s interest in Greenland as having hidden commercial and military motives, concerns that continued under the Biden administration in its recent lobbying of another Australian mining firm not to sell any of its Greenland assets to Chinese companies.

Long-standing US interest

The U.S. has had a long-standing security interest in Greenland dating from 1946, when it offered Denmark US$100 million in gold bullion for it. The Danes politely but firmly declined, with their foreign minister saying he didn’t feel “we owe them the whole island.”

In the early 1950s, the U.S built Thule Air Force Base 750 miles (about 1,200 kilometers) north of the Arctic Circle. Originally a missile early warning and radio communications site, it was transferred to the newly formed U.S. Space Force in 2020 and renamed Pituffik Space Base in 2023.

The northernmost military facility of the U.S., Pituffik has updated radar and tracking capabilities to provide missile warning, defense and space surveillance, and satellite command missions. While it also supports scientific research focused on the Arctic, the base is intended to increase military capabilities in the Arctic region for both the U.S. and its allies.

The base has the ability to track shipping as well as air and satellite positions, giving it both real and symbolic importance to American strategic interests in the Arctic. As a result, much of the U.S. foreign policy establishment, not just those in Trump’s orbit, view any notable Chinese presence in Greenland, whether temporary or permanent, with concern.

Geopolitics of the Arctic

Greenland is geographically situated between the Northern Sea Route and the Northwest Passage, two Arctic shipping routes whose importance is growing as sea ice shrinks. By around 2050, a Transpolar Sea Route is likely to open through the central Arctic Ocean, passing Greenland’s eastern shores. Furthermore, the island is the basis of Denmark’s sovereignty claim to the North Pole – rivaled by claims by Russia and Canada.

While international law recognizes no national sovereignty in international waters, that has done little to end the diplomatic tug-of-war over the pole. The matter is far from trivial: Sovereignty would give a country access to potentially significant oil, gas and rare earth resources, as well as superior scientific and military access to the future Transpolar Sea Route.

Yet, this dispute over ownership of the North Pole is only one part of the geopolitical struggle for offshore territory in the region. Russia’s growing militarization of its enormous coastal area has been countered by NATO military exercises in northern Scandinavia, while China’s own moves into the Arctic, aided by Moscow, has seen the launch of several research stations supported by icebreakers and agreements for research and commercial projects.

China’s government has also asserted it has rights in the region, for navigation, fishing, overflight, investment in oil and gas projects, and more.

Greenland for Greenlanders?

All of these factors help decipher the realities involved in the U.S.-Denmark-Greenland relationship. Despite Trump’s words, I believe it is extremely unlikely he would actually use U.S. military force to take Greenland, and it’s an open question whether he would use coercive economic policies in the form of tariffs against Denmark to give him leverage in negotiating a purchase of Greenland.

Yet while Trump and other foreign policy outsiders view Greenland through an external strategic and economic lens, the island is home to nearly 60,000 people – 90% of them indigenous Inuit – many of whom treat the designs of foreign nations on their territory with skepticism.

Indeed, in 2008, Greenland voted to pursue nationhood. The island receives an annual subsidy of 500 million euros ($513 million) from Denmark, and to further economic independence, it has sought foreign investment.

Interest from China has accompanied Greenland’s moves toward independence, backed by Beijing’s strategy to be an Arctic player. The thinking in Beijing may be that an independent Greenland will be less shackled to NATO and the European Union, and as such, more open to investment from further afield.

Ironically, Trump’s recent comments have the potential of achieving something very different than their aim by encouraging Greenland’s prime minister, Mute Egede, to propose a referendum in 2025 on full independence.

“It is now time for our country to take the next step,” he said. “We must work to remove … the shackles of colonialism.”The Conversation

Scott L. Montgomery, Lecturer, Jackson School of International Studies, University of Washington

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More

The post 4 reasons why the US might want to buy Greenland – if it were for sale, which it isn’t appeared first on theconversation.com

The Conversation

Perfect brownies baked at high altitude are possible thanks to Colorado’s home economics pioneer Inga Allison

Published

on

theconversation.com – Tobi Jacobi, Professor of English, Colorado State University – 2025-04-22 07:47:00

Students work in the high-altitude baking laboratory.
Archives and Special Collections, Colorado State University

Tobi Jacobi, Colorado State University and Caitlin Clark, Colorado State University

Many bakers working at high altitudes have carefully followed a standard recipe only to reach into the oven to find a sunken cake, flat cookies or dry muffins.

Experienced mountain bakers know they need a few tricks to achieve the same results as their fellow artisans working at sea level.

These tricks are more than family lore, however. They originated in the early 20th century thanks to research on high-altitude baking done by Inga Allison, then a professor at Colorado State University. It was Allison’s scientific prowess and experimentation that brought us the possibility of perfect high-altitude brownies and other baked goods.

A recipe for brownies at high altitude.
Inga Allison’s high-altitude brownie recipe.
Archives and Special Collections, Colorado State University

We are two current academics at CSU whose work has been touched by Allison’s legacy.

One of us – Caitlin Clark – still relies on Allison’s lessons a century later in her work as a food scientist in Colorado. The other – Tobi Jacobi – is a scholar of women’s rhetoric and community writing, and an enthusiastic home baker in the Rocky Mountains, who learned about Allison while conducting archival research on women’s work and leadership at CSU.

That research developed into “Knowing Her,” an exhibition Jacobi developed with Suzanne Faris, a CSU sculpture professor. The exhibit highlights dozens of women across 100 years of women’s work and leadership at CSU and will be on display through mid-August 2025 in the CSU Fort Collins campus Morgan Library.

A pioneer in home economics

Inga Allison is one of the fascinating and accomplished women who is part of the exhibit.

Allison was born in 1876 in Illinois and attended the University of Chicago, where she completed the prestigious “science course” work that heavily influenced her career trajectory. Her studies and research also set the stage for her belief that women’s education was more than preparation for domestic life.

In 1908, Allison was hired as a faculty member in home economics at Colorado Agricultural College, which is now CSU. She joined a group of faculty who were beginning to study the effects of altitude on baking and crop growth. The department was located inside Guggenheim Hall, a building that was constructed for home economics education but lacked lab equipment or serious research materials.

A sepia-toned photograph of Inga Allison, a white woman in dark clothes with her hair pulled back.
Inga Allison was a professor of home economics at Colorado Agricultural College, where she developed recipes that worked in high altitudes.
Archives and Special Collections, Colorado State University

Allison took both the land grant mission of the university with its focus on teaching, research and extension and her particular charge to prepare women for the future seriously. She urged her students to move beyond simple conceptions of home economics as mere preparation for domestic life. She wanted them to engage with the physical, biological and social sciences to understand the larger context for home economics work.

Such thinking, according to CSU historian James E. Hansen, pushed women college students in the early 20th century to expand the reach of home economics to include “extension and welfare work, dietetics, institutional management, laboratory research work, child development and teaching.”

News articles from the early 1900s track Allison giving lectures like “The Economic Side of Natural Living” to the Colorado Health Club and talks on domestic science to ladies clubs and at schools across Colorado. One of her talks in 1910 focused on the art of dishwashing.

Allison became the home economics department chair in 1910 and eventually dean. In this leadership role, she urged then-CSU President Charles Lory to fund lab materials for the home economics department. It took 19 years for this dream to come to fruition.

In the meantime, Allison collaborated with Lory, who gave her access to lab equipment in the physics department. She pieced together equipment to conduct research on the relationship between cooking foods in water and atmospheric pressure, but systematic control of heat, temperature and pressure was difficult to achieve.

She sought other ways to conduct high-altitude experiments and traveled across Colorado where she worked with students to test baking recipes in varied conditions, including at 11,797 feet in a shelter house on Fall River Road near Estes Park.

Early 1900s car traveling in the Rocky Mountains.
Inga Allison tested her high-altitude baking recipes at 11,797 feet at the shelter house on Fall River Road, near Estes Park, Colorado.
Archives and Special Collections, Colorado State University

But Allison realized that recipes baked at 5,000 feet in Fort Collins and Denver simply didn’t work in higher altitudes. Little advancement in baking methods occurred until 1927, when the first altitude baking lab in the nation was constructed at CSU thanks to Allison’s research. The results were tangible — and tasty — as public dissemination of altitude-specific baking practices began.

A 1932 bulletin on baking at altitude offers hundreds of formulas for success at heights ranging from 4,000 feet to over 11,000 feet. Its author, Marjorie Peterson, a home economics staff person at the Colorado Experiment Station, credits Allison for her constructive suggestions and support in the development of the booklet.

Science of high-altitude baking

As a senior food scientist in a mountain state, one of us – Caitlin Clark – advises bakers on how to adjust their recipes to compensate for altitude. Thanks to Allison’s research, bakers at high altitude today can anticipate how the lower air pressure will affect their recipes and compensate by making small adjustments.

The first thing you have to understand before heading into the kitchen is that the higher the altitude, the lower the air pressure. This lower pressure has chemical and physical effects on baking.

Air pressure is a force that pushes back on all of the molecules in a system and prevents them from venturing off into the environment. Heat plays the opposite role – it adds energy and pushes molecules to escape.

When water is boiled, molecules escape by turning into steam. The less air pressure is pushing back, the less energy is required to make this happen. That’s why water boils at lower temperatures at higher altitudes – around 200 degrees Fahrenheit in Denver compared with 212 F at sea level.

So, when baking is done at high altitude, steam is produced at a lower temperature and earlier in the baking time. Carbon dioxide produced by leavening agents also expands more rapidly in the thinner air. This causes high-altitude baked goods to rise too early, before their structure has fully set, leading to collapsed cakes and flat muffins. Finally, the rapid evaporation of water leads to over-concentration of sugars and fats in the recipe, which can cause pastries to have a gummy, undesirable texture.

Allison learned that high-altitude bakers could adjust to their environment by reducing the amount of sugar or increasing liquids to prevent over-concentration, and using less of leavening agents like baking soda or baking powder to prevent dough from rising too quickly.

Allison was one of many groundbreaking women in the early 20th century who actively supported higher education for women and advanced research in science, politics, humanities and education in Colorado.

Others included Grace Espy-Patton, a professor of English and sociology at CSU from 1885 to 1896 who founded an early feminist journal and was the first woman to register to vote in Fort Collins. Miriam Palmer was an aphid specialist and master illustrator whose work crafting hyper-realistic wax apples in the early 1900s allowed farmers to confirm rediscovery of the lost Colorado Orange apple, a fruit that has been successfully propagated in recent years.

In 1945, Allison retired as both an emerita professor and emerita dean at CSU. She immediately stepped into the role of student and took classes in Russian and biochemistry.

In the fall of 1958, CSU opened a new dormitory for women that was named Allison Hall in her honor.

“I had supposed that such a thing happened only to the very rich or the very dead,” Allison told reporters at the dedication ceremony.

Read more of our stories about Colorado.The Conversation

Tobi Jacobi, Professor of English, Colorado State University and Caitlin Clark, Senior Food Scientist at the CSU Spur Food Innovation Center, Colorado State University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More

The post Perfect brownies baked at high altitude are possible thanks to Colorado’s home economics pioneer Inga Allison appeared first on theconversation.com

Continue Reading

The Conversation

Why don’t humans have hair all over their bodies? A biologist explains our lack of fur

Published

on

theconversation.com – Maria Chikina, Assistant Professor of Computational and Systems Biology, University of Pittsburgh – 2025-04-21 07:33:00

Some mammals are super hairy, some are not.
Ed Jones/AFP via Getty Images

Maria Chikina, University of Pittsburgh

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com.


Why don’t humans have hair all over their bodies like other animals? – Murilo, age 5, Brazil


Have you ever wondered why you don’t have thick hair covering your whole body like a dog, cat or gorilla does?

Humans aren’t the only mammals with sparse hair. Elephants, rhinos and naked mole rats also have very little hair. It’s true for some marine mammals, such as whales and dolphins, too.

Scientists think the earliest mammals, which lived at the time of the dinosaurs, were quite hairy. But over hundreds of millions of years, a small handful of mammals, including humans, evolved to have less hair. What’s the advantage of not growing your own fur coat?

I’m a biologist who studies the genes that control hairiness in mammals. Why humans and a small number of other mammals are relatively hairless is an interesting question. It all comes down to whether certain genes are turned on or off.

Hair benefits

Hair and fur have many important jobs. They keep animals warm, protect their skin from the sun and injuries and help them blend into their surroundings.

They even assist animals in sensing their environment. Ever felt a tickle when something almost touches you? That’s your hair helping you detect things nearby.

Humans do have hair all over their bodies, but it is generally sparser and finer than that of our hairier relatives. A notable exception is the hair on our heads, which likely serves to protect the scalp from the sun. In human adults, the thicker hair that develops under the arms and between the legs likely reduces skin friction and aids in cooling by dispersing sweat.

So hair can be pretty beneficial. There must have been a strong evolutionary reason for people to lose so much of it.

Why humans lost their hair

The story begins about 7 million years ago, when humans and chimpanzees took different evolutionary paths. Although scientists can’t be sure why humans became less hairy, we have some strong theories that involve sweat.

Humans have far more sweat glands than chimps and other mammals do. Sweating keeps you cool. As sweat evaporates from your skin, heat energy is carried away from your body. This cooling system was likely crucial for early human ancestors, who lived in the hot African savanna.

Of course, there are plenty of mammals living in hot climates right now that are covered with fur. Early humans were able to hunt those kinds of animals by tiring them out over long chases in the heat – a strategy known as persistence hunting.

Humans didn’t need to be faster than the animals they hunted. They just needed to keep going until their prey got too hot and tired to flee. Being able to sweat a lot, without a thick coat of hair, made this endurance possible.

Genes that control hairiness

To better understand hairiness in mammals, my research team compared the genetic information of 62 different mammals, from humans to armadillos to dogs and squirrels. By lining up the DNA of all these different species, we were able to zero in on the genes linked to keeping or losing body hair.

Among the many discoveries we made, we learned humans still carry all the genes needed for a full coat of hair – they are just muted or switched off.

In the story of “Beauty and the Beast,” the Beast is covered in thick fur, which might seem like pure fantasy. But in real life some rare conditions can cause people to grow a lot of hair all over their bodies. This condition, called hypertrichosis, is very unusual and has been called “werewolf syndrome” because of how people who have it look.

A detailed painting of a man and a woman standing next to one another in historical looking clothes. The man's face is covered in hair, while the woman's is not.
Petrus Gonsalvus and his wife, Catherine, painted by Joris Hoefnagel, circa 1575.
National Gallery of Art

In the 1500s, a Spanish man named Petrus Gonsalvus was born with hypertrichosis. As a child he was sent in an iron cage like an animal to Henry II of France as a gift. It wasn’t long before the king realized Petrus was like any other person and could be educated. In time, he married a lady, forming the inspiration for the “Beauty and the Beast” story.

While you will probably never meet someone with this rare trait, it shows how genes can lead to unique and surprising changes in hair growth.


Hello, curious kids! Do you have a question you’d like an expert to answer? Ask an adult to send your question to CuriousKidsUS@theconversation.com. Please tell us your name, age and the city where you live.

And since curiosity has no age limit – adults, let us know what you’re wondering, too. We won’t be able to answer every question, but we will do our best.The Conversation

Maria Chikina, Assistant Professor of Computational and Systems Biology, University of Pittsburgh

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More

The post Why don’t humans have hair all over their bodies? A biologist explains our lack of fur appeared first on theconversation.com

Continue Reading

The Conversation

Scientists found a potential sign of life on a distant planet – an astronomer explains why many are still skeptical

Published

on

theconversation.com – Daniel Apai, Associate Dean for Research and Professor of Astronomy and Planetary Sciences, University of Arizona – 2025-04-18 17:44:00

An illustration of the exoplanet K2-18b, which some research suggests may be covered by deep oceans.
NASA, ESA, CSA, Joseph Olmsted (STScI)

Daniel Apai, University of Arizona

A team of astronomers announced on April 16, 2025, that in the process of studying a planet around another star, they had found evidence for an unexpected atmospheric gas. On Earth, that gas – called dimethyl sulfide – is mostly produced by living organisms.

In April 2024, the James Webb Space Telescope stared at the host star of the planet K2-18b for nearly six hours. During that time, the orbiting planet passed in front of the star. Starlight filtered through its atmosphere, carrying the fingerprints of atmospheric molecules to the telescope.

A diagram showing planets and stars emitting light, which goes through JWST detectors, where it's split into different wavelengths to make a spectrum. Each spectrum suggests the presence of a different element.
JWST’s cameras can detect molecules in the atmosphere of a planet by looking at light that passed through that atmosphere.
European Space Agency

By comparing those fingerprints to 20 different molecules that they would potentially expect to observe in the atmosphere, the astronomers concluded that the most probable match was a gas that, on Earth, is a good indicator of life.

I am an astronomer and astrobiologist who studies planets around other stars and their atmospheres. In my work, I try to understand which nearby planets may be suitable for life.

K2-18b, a mysterious world

To understand what this discovery means, let’s start with the bizarre world it was found in. The planet’s name is K2-18b, meaning it is the first planet in the 18th planetary system found by the extended NASA Kepler mission, K2. Astronomers assign the “b” label to the first planet in the system, not “a,” to avoid possible confusion with the star.

K2-18b is a little over 120 light-years from Earth – on a galactic scale, this world is practically in our backyard.

Although astronomers know very little about K2-18b, we do know that it is very unlike Earth. To start, it is about eight times more massive than Earth, and it has a volume that’s about 18 times larger. This means that it’s only about half as dense as Earth. In other words, it must have a lot of water, which isn’t very dense, or a very big atmosphere, which is even less dense.

Astronomers think that this world could either be a smaller version of our solar system’s ice giant Neptune, called a mini-Neptune, or perhaps a rocky planet with no water but a massive hydrogen atmosphere, called a gas dwarf.

Another option, as University of Cambridge astronomer Nikku Madhusudhan recently proposed, is that the planet is a “hycean world”.

That term means hydrogen-over-ocean, since astronomers predict that hycean worlds are planets with global oceans many times deeper than Earth’s oceans, and without any continents. These oceans are covered by massive hydrogen atmospheres that are thousands of miles high.

Astronomers do not know yet for certain that hycean worlds exist, but models for what those would look like match the limited data JWST and other telescopes have collected on K2-18b.

This is where the story becomes exciting. Mini-Neptunes and gas dwarfs are unlikely to be hospitable for life, because they probably don’t have liquid water, and their interior surfaces have enormous pressures. But a hycean planet would have a large and likely temperate ocean. So could the oceans of hycean worlds be habitable – or even inhabited?

Detecting DMS

In 2023, Madhusudhan and his colleagues used the James Webb Space Telescope’s short-wavelength infrared camera to inspect starlight that filtered through K2-18b’s atmosphere for the first time.

They found evidence for the presence of two simple carbon-bearing molecules – carbon monoxide and methane – and showed that the planet’s upper atmosphere lacked water vapor. This atmospheric composition supported, but did not prove, the idea that K2-18b could be a hycean world. In a hycean world, water would be trapped in the deeper and warmer atmosphere, closer to the oceans than the upper atmosphere probed by JWST observations.

Intriguingly, the data also showed an additional, very weak signal. The team found that this weak signal matched a gas called dimethyl sulfide, or DMS. On Earth, DMS is produced in large quantities by marine algae. It has very few, if any, nonbiological sources.

This signal made the initial detection exciting: on a planet that may have a massive ocean, there is likely a gas that is, on Earth, emitted by biological organisms.

An illustration of what scientists imagine K2-18b to look like, which looks a little like Earth, with clouds and a translucent surface.
K2-18b could have a deep ocean spanning the planet, and a hydrogen atmosphere.
Amanda Smith, Nikku Madhusudhan (University of Cambridge), CC BY-SA

Scientists had a mixed response to this initial announcement. While the findings were exciting, some astronomers pointed out that the DMS signal seen was weak and that the hycean nature of K2-18b is very uncertain.

To address these concerns, Mashusudhan’s team turned JWST back to K2-18b a year later. This time, they used another camera on JWST that looks for another range of wavelengths of light. The new results – announced on April 16, 2025 – supported their initial findings.

These new data show a stronger – but still relatively weak – signal that the team attributes to DMS or a very similar molecule. The fact that the DMS signal showed up on another camera during another set of observations made the interpretation of DMS in the atmosphere stronger.

Madhusudhan’s team also presented a very detailed analysis of the uncertainties in the data and interpretation. In real-life measurements, there are always some uncertainties. They found that these uncertainties are unlikely to account for the signal in the data, further supporting the DMS interpretation. As an astronomer, I find that analysis exciting.

Is life out there?

Does this mean that scientists have found life on another world? Perhaps – but we still cannot be sure.

First, does K2-18b really have an ocean deep beneath its thick atmosphere? Astronomers should test this.

Second, is the signal seen in two cameras two years apart really from dimethyl sulfide? Scientists will need more sensitive measurements and more observations of the planet’s atmosphere to be sure.

Third, if it is indeed DMS, does this mean that there is life? This may be the most difficult question to answer. Life itself is not detectable with existing technology. Astronomers will need to evaluate and exclude all other potential options to build their confidence in this possibility.

The new measurements may lead researchers toward a historic discovery. However, important uncertainties remain. Astrobiologists will need a much deeper understanding of K2-18b and similar worlds before they can be confident in the presence of DMS and its interpretation as a signature of life.

Scientists around the world are already scrutinizing the published study and will work on new tests of the findings, since independent verification is at the heart of science.

Moving forward, K2-18b is going to be an important target for JWST, the world’s most sensitive telescope. JWST may soon observe other potential hycean worlds to see if the signal appears in the atmospheres of those planets, too.

With more data, these tentative conclusions may not stand the test of time. But for now, just the prospect that astronomers may have detected gasses emitted by an alien ecosystem that bubbled up in a dark, blue-hued alien ocean is an incredibly fascinating possibility.

Regardless of the true nature of K2-18b, the new results show how using the JWST to survey other worlds for clues of alien life will guarantee that the next years will be thrilling for astrobiologists.The Conversation

Daniel Apai, Associate Dean for Research and Professor of Astronomy and Planetary Sciences, University of Arizona

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Read More

The post Scientists found a potential sign of life on a distant planet – an astronomer explains why many are still skeptical appeared first on theconversation.com

Continue Reading

Trending