Scientists have discovered a city-size lake hidden deep underneath the world’s largest ice sheet, and it could unlock the secrets of the sheet’s 34 million-year history. 

The hidden lake — which has been named Lake Snow Eagle after one of the Chinese aircraft that discovered it — lies in a mile-deep canyon beneath 2 miles (3.2 kilometers) of ice in the highlands of the Princess Elizabeth Land on the East Antarctic Ice Sheet. The lake has a surface area of 143 square miles (370 square km), making it one of the largest subglacial lakes beneath Antarctica‘s plentiful ice.


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