Mars Asteroid Strike: Ancient ‘Planet Killer’ Space Rock Causes Mega Tsunami on the Red Planet 3.4 Billion Years Ago – Rights History
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Mars Asteroid Strike: Ancient ‘Planet Killer’ Space Rock Causes Mega Tsunami on the Red Planet 3.4 Billion Years Ago

The planet killer asteroid that struck Mars 3.4 billion years ago also proves long-held notions that the Red Planet once held vast amounts of ocean water.