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    HomeScienceMegatsunami swept over Mars after massive asteroid hit the Red Planet

    Megatsunami swept over Mars after massive asteroid hit the Red Planet

    A Martian megatsunami — a giant killer wave that may have reached more than 80 stories tall — may have raced across 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 is now cold and dry, a great deal of evidence suggests that an ocean’s worth of water covered the Red Planet billions of years ago. Previous research found signs that two meteor strikes might have 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 sq. km).

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