A NASA animation shows what the Earth's surface would look like if all the water evaporated...

A NASA animation shows what the Earth's surface would look like if all the water evaporated...

The oceans cover most of the Earth, including its longest mountain range and the ancient bridges that humans have crossed to reach other continents. In a recent remake of a 2008 NASA video, planetologist James O’Donoghue shows what it would look like.

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