The One Laptop Per Child Project (OLPC) is toying with a novel source of power for its low-cost XO laptops: cows.
"We plan to drive a dynamo (taken from an old Fiat) through a system of belts and pulleys using cows/cattle," wrote OLPC's Arjun Sarwal, in an e-mail dated October 21 and posted to one of the group's discussion lists.
http://www.computerworld.com.au/index.php/id;1569766073