When he's not busy with his full-time gig, NASA Astronaut Don Pettit takes the time to run some of his own personal science experiments. His latest? A zero-gravity didgeridoo performance — for science.
Actually, it's not really a didgeridoo: Pettit takes a space station vacuum cleaner and cleaves off half of it, attaching two different end pieces and measuring their resonance against a couple drops of water, which throb excitingly and shed mini-droplets. Even if you're not interested in tribal music or liquid surface tension in space, the video is worth watching if only for the wacky costume change.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.