History of Antarctic Exploration: From the Heroic Age to Modern Science

On March 29, 1912, British explorer Robert Falcon Scott wrote his final diary entry in the middle of the Antarctic continent. He had just confirmed that he had reached the South Pole a full month after Norway’s Roald Amundsen. On the return journey, his food and fuel ran out. Trapped in a tent amid a blizzard at minus 40 degrees, he wrote: “I do not think I can write more. For God’s sake look after our people.”^[1] Scott and his four companions all perished inside that tent. Search parties found it eight months later.

Antarctica first became known to humanity barely 200 years ago. Yet this is not a simple tale of exploration heroism. It is also a record of how military rivalry was transformed into climate science, and how territorial conflict gave way to unprecedented international cooperation.

1. Belief in a Continent That Did Not Exist: Terra Australis

Two thousand years before Antarctica was actually discovered, people believed it had to be there.

In the fourth century BCE, Aristotle argued that a vast southern landmass must exist to counterbalance the continents of the northern hemisphere. Ptolemy reached the same conclusion in the second century CE, reasoning that the Indian Ocean must be enclosed by land to the south.^[2] This hypothetical continent was drawn onto medieval maps under the name Terra Australis Incognita — “the unknown land of the south.” It was not based on observation or surveying; it was purely the product of logical reasoning.

As European explorers opened up southern sea routes in the sixteenth and seventeenth centuries, the myth began to unravel piece by piece. In 1616, Dutch navigators Jacob Le Maire and Willem Schouten rounded Cape Horn and confirmed that Tierra del Fuego was merely an island, not part of a great southern continent.^[2] James Cook’s second voyage in 1772 descended to 71 degrees south latitude but found no continent. Cook wrote: “The risk one runs in exploring a coast in these unknown and icy seas is so very great, that I can be bold to say, that no man will ever venture farther than I have done; and that the lands which may lie to the south will never be explored.”^[3] Cook did not deny Antarctica’s existence — he judged that even if it existed, it would be inaccessible. It turned out to be a wrong prediction.

2. Three Nations Claiming First Discovery: 1820

The year 1820 is the most contested in the history of Antarctic exploration. Within just days of each other, three different nations each claimed to have sighted Antarctica first.

On January 27–28, 1820, a Russian expedition led by Admiral Fabian von Bellingshausen sighted ice shelves near the coast of East Antarctica. However, his voyage log made no mention of this being a continent, and he did not mark it as land on his charts.^[4] Three days later, on January 30, British naval officer Edward Bransfield sighted the northern tip of the Antarctic Peninsula (Trinity Peninsula) and recorded it on a map. Some argue this constitutes the first official cartographic record of the Antarctic continent.^[4] Later that same year, in November, American sealer Nathaniel Palmer sighted the Antarctic Peninsula.

The debate over who was “first” remains unresolved to this day. Modern historians generally accept that Bellingshausen most likely sighted Antarctic ice on the earliest date, while also acknowledging that Bransfield may have been the first to recognize it as a continent and record it on a map.^[4] The answer depends entirely on how one defines “discovery.”

The question of who first set foot on the continent is equally unresolved. American sailor John Davis most likely landed on the Antarctic Peninsula in 1821, but his records too are uncertain.^[4] What is clear is that during the first few decades after Antarctica was recognized, most of those who ventured there were not explorers but seal hunters. To them, Antarctica was not a destination for heroic exploration — it was a profitable hunting ground.

3. The Heroic Age: The Race to the South Pole

From the late nineteenth century to the early twentieth, expeditions from multiple nations began penetrating deep into Antarctica’s interior. Historians call this period the “Heroic Age” — a romantic name for what was, in reality, an unrelenting series of life-or-death ventures in brutal conditions.

The Amundsen–Scott Race to the South Pole

The 1911–1912 race to the South Pole is one of the most famous episodes in exploration history. The two expeditions differed in almost every respect, and those differences proved fatal.

Norway’s Amundsen studied Inuit methods and applied them rigorously. He relied on dog sledges as his primary means of transport, made skilled use of skis, ensured his entire team had polar survival training, dressed in fur clothing, and positioned food depots at close intervals.^[5] On December 14, 1911, Amundsen’s team reached the South Pole.

Scott took a different approach. He preferred horses and motor sledges over dog teams, but the horses were ill-suited to the polar environment and the motors broke down early. In the end, his team had to haul their own heavy sledges.^[5] Scott reached the South Pole on January 18, 1912 — 35 days after Amundsen. All five members of his party died on the return journey.

Notably, historical assessments of the two expeditions have shifted over time. Scott was once portrayed as a hero; Amundsen as a cold-blooded pragmatist. But modern exploration historians judge that Amundsen’s approach was scientifically superior, and that Scott’s tragedy resulted from inadequate preparation and excessive British amateurism.^[5]

Shackleton’s Survival Saga

No less famous than the Amundsen–Scott rivalry is Ernest Shackleton’s Endurance expedition of 1914–1916. Shackleton’s goal was to cross the Antarctic continent, but when the ship became trapped in the pack ice of the Weddell Sea, the plan collapsed from the very start.

In November 1915, the Endurance was crushed by the ice and sank.^[6] Shackleton and his 27 men survived for months on the ice floes, then traveled by three lifeboats to Elephant Island. From there, Shackleton set out with just five men in the 22-foot James Caird, sailing 800 miles (roughly 1,300 kilometers) through ferocious storms to reach South Georgia Island, and ultimately secured the rescue of his entire crew.^[6] Over more than two years of expedition, not a single man was lost.

Shackleton’s expedition was considered a failure at the time — it had not achieved its objective. Today it is remembered as one of history’s most dramatic survival stories and a textbook example of leadership.

4. Cooperation Born from Cold War Rivalry: The Antarctic Treaty

After World War II, Antarctica became a new arena of geopolitical tension. Argentina, Chile, and Britain made overlapping territorial claims over the Antarctic Peninsula, while the United States and Soviet Union intensified their exploration activities.^[7] Concerns simultaneously mounted over resource exploitation, the potential construction of military bases, and the possible deployment of nuclear weapons.

Paradoxically, however, this tension led to unprecedented cooperation. During the International Geophysical Year (IGY) of 1957–1958, twelve nations conducted joint scientific research in Antarctica. That experience of collaboration opened a diplomatic breakthrough.

On December 1, 1959, representatives of twelve nations signed the Antarctic Treaty in Washington, D.C.^[7] Its core provisions were threefold: first, a ban on military use of Antarctica; second, a freeze on existing territorial claims (neither abandoning nor endorsing them, but maintaining the status quo); and third, freedom of scientific research and reciprocal inspection rights over each nation’s bases.^[7] It was the first arms control agreement concluded during the Cold War.

The treaty has since been expanded. In 1991, an environmental protection protocol was added banning mineral resource extraction for fifty years, and the agreement now has 58 signatory nations.^[7] Remarkably, this framework has held for nearly seventy years. That said, tensions have again risen in the 2020s over China’s and Russia’s expanding Antarctic activities, which pose new challenges to the treaty system’s future.

5. From Military Base to Climate Record: The Strange Origins of Ice Core Drilling

Among the most important tools in modern climate science is the ice core. When scientists drill vertically through ice compressed from hundreds of thousands of years’ worth of accumulated snowfall, they can read directly the atmospheric composition and temperatures of the past. Yet this technology first developed not in Antarctica but in Greenland — and its purpose was not scientific but military.

Camp Century and the Nuclear Missile Plan

In 1959, the United States Army built a subglacial military installation in northwestern Greenland called Camp Century. Officially, it was described as a climate research and engineering experiment. In reality, it served “Project Iceworm” — a plan to construct an underground tunnel network stretching 4,000 kilometers in total, concealing 600 nuclear missiles aimed at the Soviet Union.^[8]

The base was powered by a nuclear reactor and functioned as an underground city complete with laboratories, dormitories, a barbershop, a laundry, and a library, housing approximately 200 soldiers.^[8] But the project encountered an unexpected obstacle: the glacier was moving far faster than the researchers had predicted. Analysis of ice cores drilled by the base’s geologists confirmed that the tunnels would collapse within a few years.^[8] Project Iceworm was abandoned, and Camp Century was closed in 1966.

Yet this military project left behind an unintended scientific gift. The 1,390-meter ice core drilled by Army geologists was the first sample ever to penetrate to the base of the Greenland ice sheet.^[8] Results published in the journal Science in 1969 provided the first proof that ice cores could be used to read 100,000 years of climate history.^[9]

The Pivot to Antarctic Ice Cores

The findings from Greenland turned scientists’ attention to Antarctica. The Antarctic ice sheet is far thicker than Greenland’s (up to 4,700 meters deep) and preserves a far longer record. The Soviet Union began drilling at Vostok Station in East Antarctica in the 1970s, eventually reaching a depth of 3,623 meters in the 1990s.^[10]

The 1998 analysis of the Vostok core produced a striking result: temperature change and carbon dioxide concentration tracked each other almost exactly over 420,000 years.^[10] It was the first direct evidence that greenhouse gas levels and global temperatures move together. The American WAIS (West Antarctic Ice Sheet) Divide drilling project, completed in 2011, produced a core 3,405 meters deep spanning 68,000 years, enabling annual-resolution analysis of the past 30,000 years of climate.^[11]

Data discarded from a military operation became, decades later, the central evidence through which humanity came to understand climate change.

6. Modern Antarctic Science: Discoveries Beneath the Ice

The Discovery of the Ozone Hole

In 1985, Joe Farman, Brian Gardiner, and Jonathan Shanklin of the British Antarctic Survey published observations from Halley Station in Antarctica in the journal Nature. They found that stratospheric ozone concentrations over Antarctica dropped by more than 40 percent during the Antarctic spring (September–November).^[12] The discovery prompted immediate international action, leading to the signing of the Montreal Protocol in 1987, which regulated the use of chlorofluorocarbons (CFCs) used in refrigerants and aerosols.

Notably, NASA had also detected the same phenomenon in its satellite data, but a computer program had been set to filter out abnormally low readings as errors, which delayed recognition of the finding.^[12] What appeared to be an anomalous signal turned out to be reality.

Lakes Beneath the Ice

There are lakes under the Antarctic ice sheet. Kilometers below the surface, at depths where the weight of the overlying ice and geothermal heat keep water in a liquid state. When scientists analyzing radar altimetry data from European satellites in the 1990s examined the surface of the East Antarctic ice sheet, they noticed an unusually flat region — the outline of Lake Vostok.^[13]

A study published in Nature in 1996 confirmed that Lake Vostok lies approximately four kilometers beneath the ice surface and is comparable in size to Canada’s Lake Ontario.^[13] In 2012, a Russian research team finally reached the lake surface. Antarctica’s ice sheet is now known to harbor more than 400 subglacial lakes, including Vostok.^[13] Isolated from the outside world for millions of years, these lakes attract the attention of biologists studying how life might evolve under extreme conditions.

Antarctica’s Warning

In 2019, the reanalysis of old ice core samples produced an unexpected finding. Plant fossils discovered near the base of the Camp Century ice core were reanalyzed and found to suggest that the Greenland ice sheet had completely melted and re-formed at least once within the past one million years.^[9] The implication is clear: if the ice sheet collapsed in a past that was only slightly warmer than today, then its stability under current warming trends may be far more fragile than we assume.

If the entire Antarctic ice sheet melted, global sea levels would rise by approximately 60 meters. The most important evidence for assessing that prospect lies inside the ice of Antarctica itself.

7. The Future of Antarctica: The Sustainability of Cooperation

The Antarctic Treaty system has functioned reasonably well until now. But current geopolitical shifts are placing new pressures on it.

China has expanded its Antarctic stations to five since the 2000s and is developing technology to explore resources beneath the ice. Russia has been moving away from scientific cooperation within the treaty framework, strengthening its independent activities.^[14] The ban on mineral resource extraction agreed in 1991 faces a review date in 2048, and if climate change makes Antarctica more accessible, the temptation for resource exploitation will only grow.

Meanwhile, observations continue to show that the rate of ice sheet melting is outpacing scientists’ predictions. Some researchers have raised concerns that certain glaciers of the West Antarctic Ice Sheet may have already passed a tipping point beyond which collapse cannot be stopped.^[15]

When Scott wrote his final diary entry in his tent in 1912, he could not have imagined what Antarctica would come to mean for humanity. That the ice he risked his life to explore would, a century later, become the most precise archive of humanity’s climate history. Or that this archive is now melting at an unprecedented rate.

Antarctica’s ice preserves the past. At the same time, the speed at which it disappears forecasts the future.