An iceberg the size of Chicago broke off am Antarctic ice shelf to reveal a thriving ecosystem underneath, according to ...

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

Shelf ice can be pretty, but exploring it could cost ... “You always want to be measuring the thickness of the ice in the inland lake or river,” Deputy Chief Mantels says.

ROV SuBastian/Schmidt Ocean Institute In January, an iceberg the size of Chicago broke away from a massive ice shelf in Antarctica, revealing an underwater world never before seen by humans.