Scientists Find Massive Fan Structure Under Antarctica

Beneath Antarctica's ice lies a landscape that hasn't seen daylight in millions of years, and scientists just found something extraordinary hiding there.

A research team led by geophysicist Egidio Armadillo from the University of Genoa identified an enormous fan-shaped structure spreading across half of East Antarctica. The East Antarctic Fan-Shaped Basin Province contains about 30 connected basins that widen toward the coast like someone opened a giant handheld fan beneath the ice.

The discovery came as researchers combined radar surveys with gravity, seismic, and magnetic data to see what Antarctica would look like if its ice disappeared. The ice currently pushes the bedrock down, but if removed, the land would bounce back up by as much as a kilometer.

As they examined the data, something remarkable emerged. The basins weren't randomly scattered but instead radiated outward from a central point near the South Pole in a clear pattern stretching 2,000 kilometers along the coast.

The structure likely formed through a process called rotational extension, where Earth's crust spread outward from a pivot point like opening a fan. This happened before the ancient supercontinent Gondwana broke apart, and it may have helped guide Antarctica's eventual separation from Australia millions of years ago.

Why This Inspires

This discovery is solving mysteries that matter today. The structure influences how Antarctica's ice moves and flows, helping scientists better predict changes in the ice sheet. That knowledge becomes increasingly valuable as we work to understand our changing climate.

The finding also fills in a huge gap in Earth's story. Antarctica makes up 10 percent of our planet's landmass, but we've barely been able to see what's underneath. Every discovery like this one helps complete the picture of how our continents formed and evolved.

The fan structure may even explain some of Antarctica's other dramatic features. As the fan opened up over time, it could have pushed up the towering Gamburtsev Subglacial Mountains and the Transantarctic Mountains that border the structure today.

The research team acknowledges they're still working out exact timelines and whether multiple events created the structure. Future studies will refine these details, but the basic discovery opens doors that have been frozen shut for eons.

Antarctica remains one of Earth's last frontiers, buried under ice thousands of meters thick. But piece by piece, scientists are revealing its secrets and showing us a world we never knew existed right beneath our feet.