Richard Dawkins, the prominent Oxford University biologist, has followed up The God Delusion (2006) with The Greatest Show on Earth (September, 2009). After having made the case for atheism, Dawkins now looks to debunk "Intelligent Design" and lay out the sheer volume of evidence supporting evolution. Above, Dawkins reads passages from his book and then talks about evolution and why, relative to other scientific theories, it tends to meet so much opposition. The video comes from the Guardian where you can also find a review of Dawkins' new book.
Note: you should be able to download Dawkins' book for free (in audio format) through Audible.com's standing offer. Details here.