Mars once had a vast sea the size of the Arctic Ocean

Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago

SINSIN
Jan 20, 2026 - 19:00
 0  14
Mars once had a vast sea the size of the Arctic Ocean
Spacecraft orbiting the Red Planet have helped researchers map out an ancient coastline that surrounded a large ocean billions of years ago

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