French magician and juggler Antoine Terrieux created a series of remarkably self-sustaining sculptures using different arrangements of hair dryers, and has also incorporated them in funny ways in his stage performance. He also plays with a diabolo in ways that seem to defy gravity. [via]
Ever woken up on a Saturday morning wondering how a modern wind tunnel works? (Rhetorical question; I know you haven't.) The Sauber F1 team has posted a 44 minute video explaining the ins and outs of using a wind tunnel. The video covers everything from wind tunnel design to how F1 cars are tested.
A series of blog posts by George Washington University engineering students on the aerodynamics of pterosaur flight. [more inside]
A Beginner's Guide to Aeronautics, a web-based textbook brought to you by the folks at NASA. [more inside]
Par 5 site on the science of golf balls. Service on the newly sized tennis ball. Return on the flight of tennis balls: Part 1; Rally with Part 2. Back and forth again with Ball/Court Interaction 1 and 2, and the aerodynamics of tennis ball coverings puts it away for the point. (And apparently, the weight inside a bowling ball isn't spherical and so modeling the movement of bowling balls takes university papers and presentations.[PDF])