Atom - The Key to the Cosmos - Part 2

In this three-part documentary series, Professor Jim Al-Khalili tells the story of one of the greatest scientific discoveries ever: that the material world is made up of atoms. Part 2. THE KEY TO THE COSMOS This episode tackles world-changing discoveries such as radioactivity, the Atom Bomb and the Big Bang, and tries to answer the biggest questions of all - why are we here and how were we made?
http://video.google.com/videoplay?docid=-5003968210604570515