Asteroid shaves past Earth's atmosphere
"The previously unknown object, spanning five to 10 metres across, has been named 2004 FU162. It streaked across the sky just 6500 kilometres - roughly the radius of the Earth - above the ground on 31 March, although details have only now emerged."
Antarctic craters reveal strike
"The scientists told a conference this week that the impacts occurred roughly 780,000 years ago during an ice age."
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