Karate is an incredible art form, built on the concept of merging body and mind into a defensive weapon. See how karatekas use this merger to break wood and cinder blocks with their hands and feet.
Every few years or so, a new type of extreme sport pops up for those people who want to live (and play) close to the edge. Sometimes, that involves jumping out of planes, rolling down hills in giant balls or taking pogo sticks to the next level. Test how extreme your knowledge of these fringe sports is with the extreme sports quiz. See more »
Splat! You're hit -- covered in brightly colored paint. Who shot you? Your friend, who was tracking you silently from tree to tree. Who came up with this game, sport or phenomenon we call paintball? Many trace its origins to military training -- are they right? See more »