The scientists found the secret subterranean habitat tucked away beneath the Larsen Ice Shelf — a massive, floating sheet of ice attached to the eastern coast of the Antarctic peninsula that famously birthed the world's largest iceberg in 2021. Satellite photos showed an unusual groove in the ice shelf close to where it met with the land, and researchers identified the peculiar feature as a subsurface river, which they described in a statement(opens in new tab). The team drilled down around 1,640 feet (500 meters) below the ice's surface using a powerful hot-water hose to reach the underground chamber. When...