Scientists find biggest-ever asteroid impact

March 25, 2015 4:32 PM

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More than 300 million years after a massive asteroid collided with Earth, scientists have found the planet's 118-mile-long scars. Experts say two huge underground domes in the Earth's crust, about 19 miles beneath central Australia's Warburton Basin, are evidence of the largest and most powerful asteroid impact ever found, reports Discovery.

They were left behind after an asteroid broke into two pieces, each at least 6.2 miles wide, just before hitting Earth at least 300 million years ago.

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