I thought this was a really good video. It's slightly long but it's interesting the whole way through, so you won't feel the need to twiddle your toes or pick your nose.
I also love this video... I don't know if I posted it before but I think it... uhhh... opens one's eyes?:
I wonder how many religious people have watched this and nodded their heads and said, "Yup, that's how it would be."