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Richard Dawkins explains how and why the Giant Tortoises of Galapagos evolved on each of the different islands. He shows how the different shell shapes evolved to help the tortoises adapt to environments on the different islands.Download:iPhone: HD: the RDF TV podcast through iTunes!"In May 2007 Josh and I were among those who went to Galapagos with a large group from the Center for Inquiry. As we walked with the guided parties over the islands, Josh took every opportunity to film the wildlife. Occasionally he would turn the camera on me, and I would ad lib a few words about whatever animals we were looking at. These 'vignettes' were unscripted and unrehearsed, and there was no time for any "Take 2" repetitions, because the guided walk was moving on."RichardIf you enjoy the video, and would like to help us make more videos like this, please consider donating $1 (or any other amount you'd like) to The Richard Dawkins Foundation for Reason and Science: & Music byJOSH TIMONENPresented byTHE RICHARD DAWKINS FOUNDATIONFOR REASON AND SCIENCE