The updated map of Antarctica clearly shows the landscape beneath its massive ice sheet, including its tallest mountains and deepest canyons. Notably, data revisions show the thickest ice is found in an unnamed canyon in Wilkes Land, not in the Astrolabe Basin, as previously thought.

Unseen mountains, valleys, lakes, and rivers lie under Antarctica’s mile-thick ice sheet. Changes to those hidden rivers could have dramatic global consequences.

A colossal iceberg the size of Chicago has broken from a floating glacier in Antarctica, and like a retractable roof at a stadium, the drifting structure has opened up a hidden habitat to the elements.