Bill Angel

You are correct. I did speed up the action by a factor of 2 so that the viewer would not be burdened watching a long video. I think that the underlying mechanism for natural selection has best been explained by Richard Dawkins in his work titled "The Selfish Gene".

Hi:

I liked your question about evolution and vision. You might wish to check out my blog post:

http://blogs.scienceforums.net/BillAngel/2012/09/13/the-problem-solving-ability-of-a-garden-slug-short-video/