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Published online 21 November 2002 | Nature | doi:10.1038/news021118-7
News
Satellites spy on meteorite explosions
Defence data lower forecast for asteroids exploding in Earth's atmosphere.
Every ten years an explosion equivalent to three Hiroshima atom bombs rips through the Earth's upper atmosphere, scientists in Canada and the United States report.
These explosions are not clandestine nuclear tests.
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