Andrew Price

Beneath Antarctica's colossal ice shield—over a mile thick—scientists have unveiled a pristine, prehistoric realm frozen in time for at least 34 million years. This sprawling "lost world," spanning roughly 12,000 square miles (bigger than Belgium), boasts jagged peaks, steep ridges, and deep river-carved valleys from an era when the continent teemed with flowing waters, lush forests, and possibly dinosaurs under the supercontinent Gondwana. Buried deep in East Antarctica's Wilkes Land, it's a snapshot of Earth before the deep freeze, preserved because the overlying ice has barely budged—no grinding erosion, just a natural vault sealing it away. The team used a combination of satellite imagery and radio-echo sounding – a method where planes beam radio waves through the ice and measure echoes – to map the unseen terrain. What emerged was a stunning landscape: jagged peaks, plunging valleys, and steep ridges shaped by ancient rivers before ice covered the continent. The frozen terrain lies 1.6 miles beneath the surface in East Antarctica, in a region roughly 12,000 square miles in size. While the exact timing is uncertain, they estimate the land last saw sunlight at least 14 million years ago – and likely more than 34 million years, when Antarctica first transitioned into a frozen desert. Unlike most glacial terrain, where moving ice grinds away the underlying rock, the ice here has remained relatively stationary. That’s why the landscape beneath is so perfectly preserved – almost like a natural time capsule. Scientists warn, however, that this untouched landscape is vulnerable. If Earth’s climate continues warming, the region could eventually be exposed. Temperatures between 3°C and 7°C warmer than today – similar to conditions between 14 and 34 million years ago – could trigger significant melting. [Jamieson et al., "An ancient river landscape preserved beneath the East Antarctic Ice Sheet," Nature Communications 14, 6688 (2023). DOI: 10.1038/s41467-023-42152-2]