The fireball on film

In February 2013, an asteroid smashed into Earth near the town of Chelyabinsk in Russia. The event was captured on film by hundreds of local people and the resulting videos soon found their way onto YouTube. Now, scientists are using the data which they can extract from these videos to study the asteroid. Read the papers: http://dx.doi.org/10.1038/nature12671 http://dx.doi.org/10.1038/nature12741