Astronomy Cast Ep. 333:  When Worlds Collide - HD
Channel: astrospherevids
Date: 14/02/2014

This video is sponsored by XE.com 
and Swinburne Astronomy Online (http://astronomy.swin.edu.au/sao/)

Just take a look at the surface of the Moon and you can see it experienced a savage beating in the past. Turns out, the whole Solar System is a cosmic shooting gallery, with stuff crashing into other stuff. It sure sounds violent, but then, we wouldn't be here without it.
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Image Courtesy NASA/JPL-Caltech.