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Martian ice deposit holds as much water as Lake Superior

23 November 2016 Astronomy Now

Researchers using NASA’s Mars Reconnaissance Orbiter have determined that frozen beneath a region of cracked and pitted plains on the Red Planet there lies about as much water as fills Lake Superior, largest of the Great Lakes. Scientists examined part of Mars’ Utopia Planitia region with the orbiter’s ground-penetrating instrument, revealing a deposit more extensive in area than the state of New Mexico.

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Mega-tsunamis ravaged shorelines of ancient Martian ocean

21 May 2016 Astronomy Now

The geologic shape of what were once shorelines through Mars’ northern plains 3.4 billion years ago convinces scientists that two large meteorites – hitting the planet millions of years apart – triggered a pair of mega-tsunamis. These gigantic waves, likely 120 metres high, forever scarred the Martian landscape and yielded evidence of cold, salty oceans.