Excellent talk by Susan Blackmore who presents a way of thinking about evolution and its application to more than simply genetics. Expanding upon Dawkins' idea of memes, she describes a new meme type that is capable of spreading itself without the aid of life as we know it. She points out how much energy we expend and the great dangers we expose ourselves to for the sake of memes. She then talks about the potential for extraterrestrial intelligence and presents a new equation similar to the Drake equation, only from the perspective that what we want to find isn't necessarily critters, but anything that can replicate and allow for the mutation of ideas. Really cool stuff!
http://www.ted.com/talks/view/id/269
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