Antarctica

• 1. Introduction

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  Antarctica holds the record for the lowest natural air temperature ever measured on Earth, registered at the Russian Vostok Station on the 21st of July 1983. About 70 percent of the world's freshwater reserves lie frozen here. If all of it melted, global sea levels would rise by almost 60 meters. This is Earth's southernmost and least-populated continent, surrounded by the Southern Ocean and built around the geographic South Pole. Yet it was not seen by human eyes until 1820, and no confirmed landing on its continental mass happened until 1895. How did a continent the fifth-largest of them all, about 40 percent larger than Europe, stay hidden so long? How did a place buried under ice averaging 1.9 kilometers thick become home to corals, octopuses, neutrino detectors, and a tiny Norwegian girl born in 1913? The answers run from ancient Greek philosophy to robotic submersibles exploring a seafloor revealed only in January 2025.

• 2. A Continent Imagined

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  Aristotle wrote about an "Antarctic region" around 350 BC, long before anyone could prove such a place existed. The word itself comes through Middle French and Latin antarcticus, rooted in the Greek arktikos. The Roman authors Gaius Julius Hyginus and Apuleius used the Latinized Greek name polus antarcticus for the South Pole. From that came the Old French pole antartike, attested in 1270, and later the Middle English form found in a treatise by Geoffrey Chaucer.

  Terra Australis was the idea that gripped European thinkers for centuries: a vast southern continent needed to balance the northern lands of Europe, Asia, and North Africa. This concept survived from classical antiquity until Europeans discovered Australia. The 1513 Piri Reis map shows this hypothetical Terra Australis, a landmass much larger than and unrelated to the real Antarctica.

  Matthew Flinders, an explorer of the early 19th century, doubted that a separate continent sat south of Australia, then called New Holland. He argued the name Terra Australis should belong to Australia instead. In 1824, colonial authorities in Sydney officially renamed New Holland to Australia, freeing up the older term but leaving Antarctica unnamed. Geographers reached for poetic replacements, floating names like Ultima and Antipodea before settling on Antarctica in the 1890s. The first use of that name is credited to the Scottish cartographer John George Bartholomew, who gave the continent the identity it carries today.

• 3. Ice, Rock, And Fire

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  Vinson Massif, in the Ellsworth Mountains, rises to 4892 meters as the highest peak on the continent. The Transantarctic Mountains split the landmass into West Antarctica and East Antarctica, stretching from Victoria Land to the Ross Sea. The coastline runs almost 18000 kilometers, and 44 percent of it is floating ice in the form of ice shelves, while only 5 percent is exposed rock. Rivers do exist here, and the longest is the Onyx.

  Mount Erebus on Ross Island is the world's southernmost active volcano, erupting around 10 times each day. Ash from its eruptions has been found 300 kilometers from the crater. Beneath the ice lies evidence of many more volcanoes, which could threaten the ice sheet if their activity rose. The West Antarctic Rift System drives this volcanism along the border between West and East Antarctica.

  Dome Argus in East Antarctica is the highest Antarctic ice feature, at 4091 meters, and one of the coldest, driest places on the planet. Temperatures there may fall as low as -90 Celsius, with annual precipitation of just 1 to 3 centimeters. Far below the surface sits Lake Vostok, found beneath Russia's Vostok Station, the largest subglacial lake in the world. Scientists once thought it had been sealed for millions of years. They now estimate its water is replaced by slow melting and freezing every 13,000 years.

• 4. When Forests Grew Here

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  Glossopteris, a tree that grew in waterlogged soils, once formed extensive coal deposits across what is now frozen ground. During the Cambrian period, East Antarctica sat at the equator, where seafloor invertebrates and trilobites flourished in tropical seas. For much of the Phanerozoic, Antarctica carried a tropical or temperate climate and was covered in forests, as part of the supercontinent Gondwana from the Neoproterozoic until the Cretaceous.

  Lystrosaurus, a synapsid sometimes called a "mammal-like reptile," was common in the Early Triassic, when tetrapods first appeared on the continent. The earliest known fossils of these animals come from the Fremouw Formation in the Transantarctic Mountains. Dinosaurs lived here too, though only a few genera have been described, including Cryolophosaurus and Glacialisaurus from the Early Jurassic Hanson Formation, and Antarctopelta, Trinisaura, Morrosaurus, and Imperobator from the Late Cretaceous of the Antarctic Peninsula.

  The great freeze came from geography. Around 53 million years ago, Australia-New Guinea separated from Antarctica, opening the Tasmanian Passage. The Drake Passage opened between Antarctica and South America around 30 million years ago, creating the Antarctic Circumpolar Current that completely isolated the continent. Combined with falling CO2 levels, this triggered small permanent ice caps that spread rapidly and replaced the forests. Tundra ecosystems clung on until around 14 to 10 million years ago, when further cooling wiped them out. Coal from those ancient forests was first recorded near the Beardmore Glacier by Frank Wild on the Nimrod Expedition in 1907.

• 5. Life At The Edge

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  Belgica antarctica, a flightless midge reaching just 6 millimeters, is the largest purely terrestrial animal on the continent. Invertebrate life here includes microscopic mites such as Alaskozetes antarcticus, lice, fleas, nematodes, tardigrades, rotifers, and springtails. Antarctic krill is the keystone species of the Southern Ocean, feeding whales, seals, squid, icefish, penguins, and albatrosses.

  The emperor penguin is the only penguin that breeds during the Antarctic winter. It and the Adelie penguin breed farther south than any other penguin. Around 40 bird species breed on or close to the continent. The Antarctic fur seal was hunted heavily in the 18th and 19th centuries for its pelt by sealers from the United States and the United Kingdom, while leopard seals reign as apex predators that migrate across the Southern Ocean hunting for food.

  Buellia frigida, a crust-like lichen endemic to Antarctica, serves as a model organism in astrobiology research. About 1,150 species of fungi have been recorded in the region, roughly 750 of them non-lichen-forming. Some have colonized cavities within porous rocks, shaping the formations of the McMurdo Dry Valleys. Their melanised cells resist UV radiation, and species like Cryomyces antarcticus have fueled speculation about what life on Mars might resemble.

  Three species of flowering plants survive, all in the Antarctic Peninsula: Deschampsia antarctica, Colobanthus quitensis, and the non-native Poa annua. In January 2025, the iceberg A-84, comparable in size to the city of Chicago, broke from the George VI Ice Shelf. Robotic submersibles slipped beneath the floating ice and found ecosystems rich in large corals, ancient sponges, icefish, giant sea spiders, and octopuses at depths of up to 1300 meters, possibly harboring species hidden for centuries.

• 6. The Race To The Pole

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  Edward Bransfield, a Royal Navy captain, was long thought to be the first person to see Antarctica, sighting the tip of the Antarctic Peninsula on the 30th of January 1820. But a captain in the Imperial Russian Navy, Fabian Gottlieb von Bellingshausen, recorded seeing an ice shelf three days earlier, on the 27th of January, aboard the 985-ton sloop-of-war Vostok alongside Mikhail Lazarev on the Mirny. The American sealer Nathaniel Palmer may also have been among the first to sight the peninsula, reaching it 10 months later in November 1820.

  The oldest known human remains in the Antarctic region tell a quieter story. A skull dated from 1819 to 1825 belonged to a young woman found in 1985 on Yamana Beach in the South Shetland Islands, likely part of a sealing expedition. The first confirmed landing on the continental mass came in 1895, when the Norwegian-Swedish whaling ship Antarctic reached Cape Adare.

  Roald Amundsen led the first expedition to reach the geographic South Pole on the 14th of December 1911, traveling from the ship Fram up the Axel Heiberg Glacier. One month later, the doomed Terra Nova Expedition arrived. During Ernest Shackleton's Nimrod Expedition in 1907, a party led by Edgeworth David became the first to climb Mount Erebus and reach the south magnetic pole, with Douglas Mawson taking leadership of the Magnetic Pole party on their perilous return.

  Richard E. Byrd, the American explorer, led four expeditions during the 1920s, 1930s, and 1940s, using the first mechanised tractors and surveying more of the continent than any other explorer. Ingrid Christensen became the first woman to step onto the Antarctic mainland in 1937. Decades later, in the summer of 1996-1997, the Norwegian explorer Borge Ousland became the first person to cross Antarctica alone from coast to coast, aided by a kite, and he holds the record for the fastest unsupported journey to the South Pole at 34 days.

• 7. A Continent Under Treaty

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  The 1959 Antarctic Treaty was signed by twelve countries, including the Soviet Union, the United Kingdom, Argentina, Chile, Australia, and the United States. It bans all military activity, including bases, weapons testing, and manoeuvres, allowing personnel only for peaceful or scientific purposes. Since 1959, a further 42 countries have acceded, and 29 hold 'consultative status' by demonstrating significant research. Decisions are reached by consensus rather than a vote.

  Seven countries claim sovereignty over regions of Antarctica, and these claims are not universally recognised. The Argentine, British, and Chilean claims overlap and have caused friction. In 2012, after the British Foreign and Commonwealth Office named an area Queen Elizabeth Land for Queen Elizabeth II's Diamond Jubilee, the Argentine government protested. New claims have been suspended since 1959, though in 2015 Norway formally defined Queen Maud Land to include the unclaimed area between it and the South Pole.

  The Madrid Protocol, formally the Protocol on Environmental Protection to the Antarctic Treaty, entered into force in 1998 and bans all mining, designating the continent "a natural reserve devoted to peace and science." It is due to be reviewed in 2048. This replaced an earlier mining convention adopted in 1988, which Australia and then France refused to ratify after a strong campaign from environmental organisations. The Convention for the Conservation of Antarctic Marine Living Resources, in force since 1980, regulates fisheries, yet illegal fishing of the prized Patagonian toothfish, marketed as Chilean sea bass in the United States, remains a problem.

• 8. Science At The Bottom Of The World

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  The IceCube Neutrino Observatory, the largest neutrino detector in the world, sits at the Amundsen-Scott South Pole Station. It uses around 5,500 digital optical modules, some reaching a depth of 2450 meters, held within a cubic kilometer of ice. The thinner atmosphere and lack of water vapour at high elevation sharpen the view of space, drawing astrophysicists to study cosmic microwave background radiation and neutrinos.

  McMurdo Station, run by the United States, is the largest research station and can house more than 1,000 people. In 2017, more than 4,400 scientists worked in Antarctica during the summer, a number that fell to just over 1,100 in winter. There are over 70 permanent and seasonal stations, and the Belgian Princess Elisabeth station was the first to be carbon-neutral.

  The Adelie Land meteorite, discovered in 1912, was the first ever found on the continent. The dry polar desert preserves meteorites so well that some older than a million years have been recovered, and dark stones stand out against ice and snow. Most come from asteroids, but a few found in Antarctica came from the Moon and Mars, carrying clues about the early Solar System.

  Human life here leaves its own record. Solveig Gunbjorg Jacobsen, a Norwegian girl, was the first child born in the southern polar region, at Grytviken on the 8th of October 1913. Emilio Marcos Palma became the first person born on the Antarctic mainland, at the Argentine Army's Esperanza Base on the 7th of January 1978. Each December the 1st, Antarctica Day marks the signing of the treaty that keeps this frozen reserve devoted to science.