Science

The megatsunami hit Mars after a massive asteroid hit the Red Planet

The megatsunami hit Mars after a massive asteroid hit the Red Planet

A Martian megatsunami — a giant killer wave that may have reached more than 80 stories high — may have swept through the Red Planet after a cosmic impact similar to the one that likely ended Earth’s age of dinosaurs, a new study finds.

Although the surface of Mars now cold and dry, much evidence suggests that an ocean’s worth of water covered the Red Planet billions of years ago. Previous research found signs that two meteor impacts may have been triggered a pair of megatsunamis (opens in new tab) about 3.4 billion years ago. The older tsunami inundated about 309,000 square miles (800,000 square kilometers), while the more recent one drowned a region of about 386,000 square miles (1 million square kilometers).



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