More asteroids strike Earth since age of dinosaurs: study

Between two and three times as many asteroids have struck the Earth and the Moon since the age of the dinosaurs, when one massive space rock collision wiped them out forever, researchers said Thursday. The mounting pace began around 290 million years ago, and likely coincides with some kind of large cosmic smashup in the main asteroid belt between the orbits of Mars and Jupiter, researchers reported in the US journal Science. The result was space debris, some of which made its way to the Earth and the Moon, leading to a rate of asteroid impacts 2.6 times higher than it was prior to 290 million years ago.

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