If you ever wondered how or why a boomerang always comes back when you throw it (correctly, at least), popular science YouTuber Veritasium has the answer.
Like most things in life, it's all about lift, relative velocity and gyroscopic precession.
His next video should be "how to catch a boomerang without getting your hand cut off."
Keith Shaw rounds up the best in geek video in his ITworld.tv blog. Follow Keith on Twitter at @shawkeith. For the latest IT news, analysis and how-tos, follow ITworld on Twitter, Facebook, and Google+.