A cold place with a big reach
Antarctica is the coldest place on Earth. It has no cities and no permanent native population. Most of the land sits under a huge sheet of ice. Yet this faraway place still affects the United States.
Its ice can raise sea level when it melts into the ocean. Its seas help move heat around the planet. U.S. scientists also use Antarctica to study climate, wildlife, space, and the history of Earth.
A continent for peace and science
No one country owns Antarctica. Some nations have old land claims, but the Antarctic Treaty keeps those claims from turning into new land grabs. The treaty was signed in Washington in 1959. It took effect in 1961.
By 2026, 58 nations were part of the treaty. The main rules are simple. Antarctica must be used for peace. Science must be free to continue. Nations should share data. Later rules added strong care for wildlife and the land.
The treaty is still a rare case of nations working together in a place with no normal national government.
The U.S. Antarctic Program
The National Science Foundation runs the U.S. Antarctic Program. It supports three year-round stations: McMurdo, Amundsen-Scott South Pole, and Palmer.
McMurdo is the largest U.S. base on the continent. It is also the main supply hub. South Pole Station supports work in climate, ice, and space science. Palmer Station supports ocean and wildlife research near the Antarctic Peninsula.
In June 2026, NSF announced a new support contract for the program. It can run for 20 years and has a top value of $8 billion. That gives the U.S. a long-term base for science on the ice.
People who work there do many jobs. They cook, fix machines, run power plants, treat water, fly aircraft, manage data, and care for patients. The stations must work like small towns in a very hard place.
Why the science matters
Antarctica is a good place for hard science. Old ice can trap tiny bubbles of air from the past. Those bubbles help show what Earth’s air was like long ago.
Teams also watch glaciers, snow, sea ice, ocean water, birds, seals, and penguins. At the South Pole, the dry air is also useful for space research.
For a look at another icy region, our Greenland in 2026 guide explains how ice, climate, people, and politics can meet in one place.
Ice loss and U.S. coasts
NASA data show that Antarctica has been losing about 135 billion tons of ice each year on average since 2002.
The loss is not the same in all areas. West Antarctica has seen some of the biggest changes. Pine Island and Thwaites glaciers get close study because warm ocean water can melt ice from below.
This matters to U.S. coastal towns. More water in the ocean can raise flood risk. It can make storm surge worse. It can also push salt water into marshes and water supplies.
Sea ice is not the same as land ice
Sea ice floats on the ocean. It grows in winter and melts in summer. When sea ice melts, it does not raise sea level in the same way as land ice.
Still, sea ice matters. It can affect wildlife, ocean heat, and sunlight.
Antarctic sea ice reached its 2026 summer low on February 26. It covered about 2.58 million square kilometers. That was more ice than in several very low recent years, but it was still below the 1981–2010 average.
In August 2026, sea ice averaged about 16.46 million square kilometers. Scientists also saw a sharp one-week drop during the winter growth season. Weather can cause short swings, so one week does not tell the whole story.
Wildlife around the ice
The Southern Ocean is home to penguins, seals, whales, fish, and krill. Krill are small, but many larger animals depend on them for food.
Sea ice can shape where some animals feed and breed. That means changes in ice, fishing, or water temperature can affect the whole food web.
Travelers can use the same low-impact mindset found in this Leave No Trace guide from Noah’s Outdoors. Antarctica is far more strict, but the idea is the same: do less harm in fragile places.
Travel to Antarctica
More people now visit Antarctica by expedition ship. Most trips start in South America. The weather can change fast. The sea can be rough. Landing rules are strict.
Before a trip, check the tour firm, health rules, rescue plans, and gear needs. A simple Antarctica travel guide from Amazon can help you learn the basics. Waterproof binoculars from Amazon can also help you view wildlife from a safe distance.
If you like slower trips, our quiet travel guide shows why fewer stops can make a trip feel better. Antarctica often rewards that same slow pace.
Politics at the bottom of the world
Antarctica is peaceful, but politics still matter. Nations fund bases, send research teams, attend treaty meetings, and watch what other nations do.
Fishing, tourism, science, and future influence can all lead to debate. The treaty gives nations a way to work through those issues.
The Arctic has its own set of rules and risks. Our NATO in 2026 guide looks at how security issues are changing in the far north. Antarctica is different, but both polar regions show how land, science, and national goals can overlap.
Why Antarctica matters in 2026
Antarctica may look empty on a map. It is not empty in its effect on the world.
U.S. scientists work there. U.S. coastal towns face sea-level risk. U.S. travelers visit. U.S. officials also help shape treaty rules. Those rules keep the land focused on peace and science.
Antarctica is part of the same Earth system we live in each day. What happens there can reach us through the ocean, the air, and the choices nations make together.
