This showed up on one of the nano RSS feeds.  It has nothing to do with nano but it is funny and clever.  In the quest for renewable energy why not harness the energy hamsters expend running around their wheels.  There are hamster-powered floor cleaners, nanogenerators and my favorite a hamster-powered submarine.  It isn’t exactly clear how much you have to feed the hamster and how much energy you get, but they are cute.
 http://tinyurl.com/6uu5cjz