This Impact Crater Was Likely Ground Zero for an Ancient Mega-Tsunami on Mars | WHAT REALLY HAPPENED

This Impact Crater Was Likely Ground Zero for an Ancient Mega-Tsunami on Mars

Ground zero for the impact that caused a Mars mega-tsunami more than 3 billion years ago may have been found.

The meteor that spawned that ancient flood probably blasted out Lomonosov Crater, a 75-mile-wide (120 kilometers) hole in the ground in the icy plains of the Martian Arctic, a new study reports.

Lomonosov's large size suggests that the impactor itself was big — similar in scale to the 6-mile-wide (10 km) asteroid that hit Mexico's Yucatan Peninsula 66 million years ago, sparking a mass extinction that killed off 75% of Earth's species, including the dinosaurs.

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