For nearly 200 years, scientists have been exploring Antarctica, on the hunt for new organisms, data that could reveal Earth’s climate history, and signs of a changing environment.

Since Antarctica is the only continent with no native human population, the United States and 11 other countries signed the Antarctic Treaty in 1959 to ban military activity and promote scientific investigations. More than 40 other countries have joined the agreement since then, and the number of research stations on the continent has continued to grow.

Thousands of biologists, ecologists, and geologists conduct research in Antarctica, the coldest, driest, and most remote continent on Earth. The area’s largest base, Amundsen-Scott South Pole Station, belongs to the US, which also runs two other year-round outposts.

Take a look at some of the recent Antarctic research projects and the challenges these scientists face.


Environmental changes in Antarctica have global repercussions. If all the ice stacked on top of Antarctica melted, global sea levels would rise by about 200 feet.

Foto: Melting ice showing through at a cliff face at Landsend, on the coast of Cape Denison in Antarctica.sourcePauline Askin/Reuters

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Antarctica lost more than 3.3 trillion tons of ice from 1992 to 2017, causing global sea levels to rise by nearly one-third of an inch. About 40% of that loss occurred from 2012 to 2017, according to a study published in Nature earlier this year.

Foto: Mountains and land ice as seen from NASA's Operation IceBridge research aircraft in the Antarctic Peninsula region.sourceMario Tama/Getty Images

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NASA's ongoing Operation IceBridge is looking at changes in polar ice. Through a series of research flights over West Antarctica, scientists concluded that the West Antarctic Ice Sheet may have reached a point of irreversible decline.

Foto: Blood Falls (bottom left) and the Taylor Glacier near McMurdo Station on November 11, 2016.sourceMark Ralston/AP

Read more: NASA's photos of a perfectly rectangular iceberg in Antarctica are oddly satisfying


Jerry Mitrovica, a Harvard geophysicist, told The Associated Press in 2015 that parts of Antarctica are melting so quickly that it has become "ground zero of global climate change without a doubt."

Foto: Wenjun Li, a marine chemist from China, walking along the beach in search of samples in Hannah Point on Livingston Island in the South Shetland Islands.sourceNatacha Pisarenko/AP

Source: AP


Each year, thousands of scientists conduct research at stations on the continent.

Foto: Wooden arrows showing the distances to various cities near Chile's Escudero station on King George Island.sourceNatacha Pisarenko/AP

Source: National Science Foundation


Scientists come to Antarctica to better understand its ecosystems. The continent's clear skies and dry, cold conditions also allow researchers to make space observations.

Foto: The research station Port Lockroy is on the northwest shore of Wiencke Island in Antarctica's Palmer Archipelago.sourceWillem Tims/Shutterstock

Newcomers face an extreme climate and a stunning remoteness. Field science in Antarctica is very expensive, so scientists don't venture there for studies unless they need to.

Foto: The Almirante Brown Antarctic Base, run by Argentina, is in Paradise Bay.sourceerwinf/Shutterstock

Source: National Science Foundation


Scientists often travel to Antarctic research stations aboard large ships designed to break through thick ice.

Foto: Araon, a South Korean ice-breaking research vessel, brought a group of scientists from New Zealand to the Weddell Sea region of the Antarctic Peninsula.sourceJack P./Flickr

Source: National Science Foundation


Alex Gaffikin, a meteorologist who moved to Antarctica at 22 and spent 2 1/2 years at Halley, a British research station, told Reuters in 2007 that winters were tough because the constant darkness made her lethargic.

Foto: The Amundsen-Scott South Pole Station, a US base, can house 154 people in dorm-style single rooms.sourceJeffrey Donenfeld/National Science Foundation

Source: Reuters


Gaffikin said she often went to bed exhausted but enjoyed getting up in the middle of the night to see the southern lights. "I love Antarctica because it is such an alien and magical place," Gaffikin told Reuters. "You can see things in Antarctica that you can't see anywhere else, like emperor penguin colonies, enormous glaciers, and gigantic sea creatures."

Foto: A dorm room in the Amundsen-Scott South Pole Station building.sourceCalee Allen/National Science Foundation

As part of the NASA-funded Barrel mission in January 2013, scientists launched 20 balloons into the air to study how radiation belts around Earth are formed.

Foto: The RRS Ernest Shackleton is docked near Halley Research Station in Antarctica. The British ship brings scientists and supplies to the station.sourceNASA/Flickr

Source: NASA


"The study of near-Earth radiation is very important," John Mather, the chief scientist of NASA's Science Mission Directorate, said at the start of the program in 2007. "This research will provide information to mitigate problems here on our planet as well as permit better design and operations of new technology in space and safer passage for space explorers."

Foto: Scientists running under the payload as a balloon takes flight at the Sanae IV research station.sourceNASA/Flickr

Source: NASA


NASA's Barrel team wrapped up its last mission in 2016. The team conducted research at the Sanae IV station, which is led by the South African National Antarctic Program.

Foto: A group of international researchers examining samples at a research station in Antarctica.sourceJack P./Flickr

Source: SANAP


Harsh conditions can make it impossible for boats to come near a research station, so scientists often depend on planes to deliver cargo.

Foto: A supply storage area at McMurdo Station in 2006.sourceTed S. Warren/AP

Eating wildlife is now off-limits, but a 1950s recipe book from the British Rothera Research Station shows that scientists used to eat penguin eggs, seal brains, and grilled cormorant. At the Rothera base, people shot seals for dog food until 1994.

Foto: A seal on Deception Island.sourceAlexandre Meneghini/Reuters

Source: Reuters


Chefs now get the bulk of their supplies by ship. “You have to use what you've got in the store — frozen stuff, tinned stuff, and, if you're really desperate, the dried stuff,” Alan Sherwood, a chef at the Rothera base, told Reuters in 2009

Foto: Sherwood prepares a dinner for 100 staff members on January 23, 2009.sourceAlister Doyle/Reuters

Source: Reuters


Scientists in Antarctica are careful about rationing their water. While about 90% of the world's ice is in Antarctica, living there is a lot like being in a desert.

Foto: Horacio Marcos, an Argentine air force officer, connects a pipe from an artificial frozen lagoon to get water for Argentina's Marambio Base on March 7, 2008.sourceEnrique Marcarian/Reuters

Source: National Snow and Ice Data Center


Residents melt snow during the winter to drink water. In the summer, they use pipes to extract water from artificial lagoons that gather snow.

Foto: Marcos pouring water into the artificial frozen lagoon.sourceEnrique Marcarian/AP

Any Americans trying to leave their station for field work or recreation are required to attend safety and survival courses first.

Foto: US Antarctic Program participants at a field-safety class in McMurdo Station's Crary Laboratory classroom.sourceElaine Hood/National Science Foundation

Britney Schmidt, a professor of planetary science at the Georgia Institute of Technology, went in the field with Artemis, a 25-foot-long underwater robot that drills holes through several feet of ice, in 2016. Schmidt said she hoped the testing would pave the way for underwater exploration of Europa, Jupiter's icy moon.

Foto: Scientists setting up a tent on the McMurdo Ice Shelf for a field camp.sourcePeter Rejcek/National Science Foundation

Source: Antarctic Sun


NASA also studies the remoteness of Antarctica to understand what people would experience if they visited Mars. "Antarctica in many ways is like another planet," Jose Retamales, the director of the Chilean Antarctic Institute, told the AP in 2015. "It's a completely different world."

Foto: A worker from Chile's Antarctic Institute sits on the snow on Robert Island, part of the South Shetland Islands, in 2015.sourceNatacha Pisarenko/AP

Source: AP


Joe Levy, a professor of geology at Colgate University, has also drawn comparisons between Antarctica and Mars. Levy has studied water tracks as they move under the soils of the McMurdo Dry Valleys, a phenomenon that may be similar to patterns on Mars.

Foto: Levy, a planetary scientist, setting up a digital thermal-imaging camera.sourcePeter Rejcek/National Science Foundation

In 2015, Peter Convey, an ecologist, traveled through nearly freezing temperatures and 20-knot winds to collect samples of spongy green and brown mosses that grow on the ash of a volcanic island in the area. Convey was trying to determine how long the mosses have been evolving on the continent.

Foto: Convey, an ecologist for the British Antarctic Survey, searching for samples on Deception Island.sourceNatacha Pisarenko/AP

Convey has been traveling to Antarctica for more than 25 years. "I've been lucky and I've gone to the middle of the continent, so I've been isolated from the next human being for 400 to 500 kilometers," about 250 to 300 miles, he told the AP in 2015.

Foto: Convey examines rocks for bugs on January 11, 2009, near the Rothera base on the Antarctic Peninsula.sourceAlister Doyle/Reuters

Source: AP


In addition to preparing for frigid temperatures and isolation, field scientists have to be careful about sunburn. More than 80% of scientists in the South Pole are exposed to up to five times the recommended limit of UV rays, according to a 2009 study by the Australian Antarctic Division and the Australian Radiation Protection and Nuclear Safety Agency.

Foto: Tony Stewart checks a cable during construction work at Cape Denison on December 20, 2009.sourcePauline Askin/Reuters

Source: Reuters


Some researchers focus on the sea, studying marine macro-algae and invertebrates in the water.

Foto: Two scientific divers, Chuck Amsler (left, in red) and Sabrina Heiser (right, in black), enter the water from Rigil, a Rigid Hull Inflatable Boat used at Palmer Station, on May 10, 2017.sourceMaggie Amsler/National Science Foundation

Animals that live on the Antarctic seabed are used to extremely cold conditions, but they are also very sensitive to small changes in temperature. Global warming can make these animals more vulnerable to predators, and if these changes disrupt the food chain, then larger animals may suffer too.

Foto: Ali Massey and Terri Souster emerge from icy waters off Antarctica after collecting marine samples near the Rothera research base.sourceAlister Doyle/Reuters

Source: The Guardian


Antarctica may be known for its penguins and seals, but these animals don't search for food outside the sea. On land, the largest predators are mites. The biggest land animal, a flightless midge, is no more than a quarter-inch long.

Foto: A Norwegian researcher gets ready to drive a snow scooter outside the Troll research station, about 155 miles from the sea, on January 20, 2008.sourceAlister Doyle/Reuters

Source: Reuters


As more scientists and tourists visit Antarctica, however, seeds, lichens, and mosses are introduced to the continent.

Foto: Scientists taking samples from natural water bodies in the Antarctic.sourcepolarman/Shutterstock

Some of the biggest discoveries in Antarctica have been unexpected. In July 2015, NASA scientists discovered the first meteorite impact craft under the Greenland ice sheet. Hiding below more than half a mile of ice, the crater has a depth of about 1,000 feet and a diameter of more than 19 miles.

Foto: John Sonntag, a NASA Operation IceBridge mission scientist, walks to the hangar after a long science flight aboard NASA's research aircraft in the Antarctic Peninsula region on November 3, 2017.sourceMario Tama/Getty Images

Source: NASA


The researchers spent three years verifying their findings, which were published on November 14 in Science Advances. "The crater is exceptionally well-preserved and that is surprising because glacier ice is an incredibly efficient erosive agent that would have quickly removed traces of the impact," Kurt Kjaer, a professor at the Natural History Museum of Denmark who led the study, said in a press release.

Foto: Sea ice floating near the coast of West Antarctica as seen from a window of a NASA Operation IceBridge airplane on October 27, 2016.sourceMario Tama/Getty Images

Source: NASA


Scientists on field missions sometimes face challenging obstacles. In March, five US researchers were stranded on an island off the Antarctic coast because weather conditions made it impossible for an American ship to pick them up. An Argentine icebreaker rescued them a few hours later.

Foto: The stranded American scientists on Joinville Island.sourceArgentina Navy via AP

Source: Earth & Space Science News


The National Science Foundation said the scientists were never in danger because they had a surplus of supplies. "This wasn't an emergency, but we are very grateful that we can engage with our international partners to take care of situations that could become emergencies," Kelly Falkner, the director of the foundation's Office of Polar Programs, told Earth & Space Science News.

Foto: An Argentine helicopter landing to rescue the stranded American scientists.sourceArgentina Navy via AP

Source: Earth & Space Science News


Conducting research in Antarctica's harsh conditions can be dangerous, though. In October 2016, a Scottish climate scientist, Gordon Hamilton, died after the snowmobile he was driving fell 100 feet into a crevasse.

Foto: A member of the research team at Argentina's Orcadas Base in Antarctica visiting the base's cemetery.sourceReuters

Source: Reuters


"You don't have to be a rocket scientist to look around and see how extreme this environment is," Jenny Blamey, the research director of the Biosciences Foundation in Chile, told the AP. Blamey studies the genetic material of microorganisms.

Foto: Jenny Blamey looking at samples in her room aboard the navy ship, near Almirantazgo Bay off Livingston Island.sourceNatacha Pisarenko/AP

Source: AP


Inside research stations, scientists work to better understand some of Antarctica's mysteries. The bodies of some Arctic and Antarctic species, such as sea spiders, are unusually large, and researchers are trying to figure out what led to that.

Foto: Bret Tobalske, a biologist, scooping up one of the smaller giant sea spiders that his team is keeping in a chilled ocean water tank in the Crary Lab.sourceMike Lucibella/National Science Foundation

Read more: Humongous sea spiders from Antarctica are baffling scientists


Scientists also study how the effects of climate change, such as warming waters and ocean acidification, are affecting marine animals.

Foto: Kevin Johnson and Juliet Wong pulling a set of bongo nets out of the water, bringing in thousands of tiny sea snails.sourceMike Lucibella/National Science Foundation

Bill Fraser, a scientist at the Polar Oceans Research Group, has been studying penguins since 1975. He looks at the effect of environmental changes on the marine ecosystem.

Foto: Four members of Fraser's research team analyzing krill in a biology lab at Palmer Station.sourceKeri Nelson/National Science Foundation

Many projects also analyze ice samples to find new information about Earth's climate history. Tiny air bubbles within ice cores can help scientists understand what the atmosphere used to be like.

Foto: Murat Aydin, the lead scientist for the South Pole Ice Core, cleaning cutting fluid off an ice core as he prepares it for storage.sourceMike Lucibella/National Science Foundation

Read more: The US government keeps a massive archive of ice - here's why


In this West Antarctic ice core, the dark band corresponds to a layer of volcanic ash that settled about 21,000 years ago.

Foto: An ice core from the West Antarctic Ice Sheet Divide.sourceHeidi Roop/National Science Foundation

In addition to researchers, the US Antarctic Program hires hundreds of workers to maintain internet and phone service. The workers reach remote locations via helicopter to make sure all the equipment functions properly.

Foto: US Antarctic Program communications personnel checking a battery pack.sourceChris Kannen/National Science Foundation

Employees at McMurdo Station's Berg Field Center also provide support for the scientists, repairing equipment like sleds and stoves for field missions.

Foto: An employee outfitting tents with rope lines, and melting the ends with a lighter to keep them from fraying.sourceTravis Senor/National Science Foundation

Though field work in Antarctica requires a lot of adapting to harsh conditions, life inside a base can proceed as normal.

Foto: Scientists and members of the Spanish Gabriel de Castilla Base watching a movie on Deception Island in 2015.sourceNatacha Pisarenko/AP

Living in Antarctica also doesn't stop people from voting in elections. Lesley Eccles, one of dozens of Australians who voted from Antarctica in 2004, told the Australian Broadcasting Corporation she was interested in the results but had found it hard to keep up with the news.

Foto: Scientists at Casey, an Australian Antarctic Division research station in Antarctica, line up to cast their ballots on October 7, 2004, two days before Australia's national election.sourceMark Healey/Australian Antarctic Division/Reuters

Source: Australian Broadcasting Corporation


Despite its remoteness, Antarctica still has religious services for residents. Priests come to Russia's Bellingshausen Station for one year at a time.

Foto: A Russian Orthodox priest, Sophrony Kirilov, walks to the Holy Trinity Church, precariously perched on a rocky hill on King George Island, in 2015.sourceNatacha Pisarenko/AP

Some tourists and scientists visit the Russians' Holy Trinity Church to pray in silence, while others come to look at the saints and angels painted on golden panels.

Foto: Kirilov inside the church.sourceNatacha Pisarenko/AP

Researchers can also visit a chapel at McMurdo Station. In 2016, the US secretary of state at the time, John Kerry, stopped by the chapel during a trip to Antarctica.

Foto: Kerry leaving the chapel on November 12, 2016.sourceMark Ralston/Reuters

Source: AP


Kerry is the highest-ranking US government official to visit the continent. "I particularly wanted to come down here because I was in the Arctic recently and the scientists there kept saying to me ... 'You got to go to Antarctica, you got to get a sense of what is really at risk here, you have to understand the science and what is happening there,'" he told The Antarctic Sun.

Foto: Kerry talking with John Snow, a scientist, about the increased movement of icebergs across Antarctica.sourceMark Ralston/Reuters

Source: Antarctic Sun


To prevent ice sheets in the Antarctic from collapsing and flooding the world's coasts, some climate scientists have come up with a potential solution: building giant walls under the ice sheets to keep them from falling apart.

Foto: sourceTorsten Blackwood - Pool/Getty Images

Source: Business Insider


The solution focuses on only one aspect of climate change, and it would not eliminate the problem of global warming. But it could buy enough time for coastal cities to adapt and for people to reverse some of the climate change we have caused.

Foto: The Thwaites Glacier in Antarctica.sourceNASA

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