BBC地平线：陨石真相大揭密 (2013)
简介 On a bright, cold morning on 15th February 2013, a meteorite ripped across the skies above the Ural mountains in Russia, distintegrating i nto three pieces and exploding with the force of 20 Hiroshima
s. 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 the Earth.
