Scientists explored the seafloor after an iceberg broke off the Antarctic ice sheet. They were shocked by what they found. Thriving ecosystems were hiding in the deep, dark waters beneath where the iceberg broke off.

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.

Never seen, perhaps, but that doesn't mean forever to remain unknown. For years, the British Antarctic Survey has been flying planes over the frozen southern continent, using radar, sound waves, and gravity mapping to ascertain the shape of the bedrock sequestered below.