I just ran across a fascinating new post about Manu Prakash, a bioengineering professor from Stanford who’s come up with a hand-powered centrifuge that costs $0.20. It’s based on a whirligig (the children’s toy) and was designed for use in field hospitals that don’t have reliable electricity for testing for malaria. It’s been field-tested in Madagascar and seems to work perfectly! He’s also the guy who came up with a $1 microscope made of paper. I’d give a lot to be able to come up with those kinds of insights while helping people and saving lives.