Richard Dawkins gives an introduction to his new book "The Greatest Show on Earth: The Evidence for Evolution." He explains why this book was necessary, and what readers can expect from this highly-anticipated work. The book is available now in the UK, and will be released in the US on September 22nd!

Read the first chapter of "The Greatest Show" at http://richarddawkins.net/thegreatestshowonearth

Also available as an unabridged audiobook on CD.

Richard Dawkins is the bestselling author of "The God Delusion" and "The Selfish Gene."

Interview footage by
DJF Productions

Additional video & music by
Josh Timonen