NOVAفصل 40 جایگزینی تصویرشماره قسمت13Meteor StrikeOverviewOn February 15, 2013, a 7,000-ton asteroid crashed into the Earth's atmosphere over Russia with the power of 30 Hiroshima bombs. Within days, NOVA crews joined impact scientists in Russia as they hunted for clues about the meteor's origin and makeup.Air dateMarch 27, 2013Runtime (min)60
