Tag: Costard, Francois

When a Mega-Tsunami Drowned Mars, This Spot May Have Been Ground Zero

The area where the northern ocean was thought to exist also contains what are called thumbprint terrains, found on the landward side of those suspected ancient shorelines. These terrains may have been etched by the chaotic and violent flow of water in the aftermath of the mega-tsunamis. But which craters were tied to the impacts […]

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