Fit and athletic amputees - like sprinter/long-jumper Aimee Mullins - have proved over and over that the loss of a limb is no reason to give up sports. But prostheses for swimmers have remained clunky, at best.

That's why Richard Stark, an industrial design student at Sweden's Umea Institute of Design, was inspired to create Neptune, a specially-designed prosthesis that helps amputees swim.

Going to the movies is always fun, but would you still enjoy it if you knew the movie was watching you?

Soon, movie theaters may be equipped with cameras that will use facial recognition technology to monitor which way you are facing; if you're laughing, scared, or bored; and if you came alone or with friends.