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Planetary science

Planetary science

Did the Earth get hit by multiple impacts?

12 Mar 1998

When the comet Shoemaker-Levy 9 crashed into Jupiter in 1994, scientists told the public that the chances of a similar impact on the Earth were extremely low. Now a paper in Nature claims that such an event occurred 214 million years ago during the Triassic period.

Simon Kelley of the Open University in the UK, John Spray of the University of New Brunswick, an

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