On a bright, cold morning on 15th February 2013, a meteorite ripped across the skies above the Ural mountains in Russia, distintegrating into three pieces and exploding with the force of 20 Hiroshimas. It was a stark reminder that the Earth's journey through space is fraught with danger. A day later another much larger 14,3000 tonne asteroid, passed within just 17,000 miles of ... 想看更多的未知相關(guān)BBC地平線:隕石真相大揭密,請關(guān)注我們的網(wǎng)站:www.e1556.cn
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