Image sizes on Facebook: A cheat sheet \\ This guide lists all the image dimensions you need to keep your Facebook page looking sharp. The sizes for app images, cover photo and timeline pics are all here.
University of Maryland grad students trying to make a human-powered flying machine that can ascend ten feet, remain in the air for 60 seconds, without drifting outside of a 10 meter box. Apparently there's a big wad of cash in it for them if they succeed. They're getting close.