Sorry to dig up an old post, but since I found one that related directly to the subject I thought I would post here.
I found an article on biomimicry, specifically
biomimicking sharks. It looks like these people also have a
book that will be coming out about the top 100 ways they have found to mimick nature. They have found better ways for many things, from
heating and cooling homes to solar power to how we clean our boats (this is where sharks come in). I don't want to say too much, just that you should check out the article and I hope you enjoy.