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Asteroids cause dozens of nuclear-scale blasts in Earth's atmosphere
Many explosions stronger than Hiroshima bomb but most occur too high above ground to cause serious damage
theguardian.com, Tuesday 22 April 2014 13.00 EDT
People look at what is believed to be a chunk of the Chelyabinsk meteor in Russia in 2013. Photograph: Alexander Firsov/AP
Asteroids caused 26 nuclear-scale explosions in the Earth's atmosphere between 2000 and 2013, a new report reveals. ...
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