We've seen a number of robotic prosthetic hands intended for amputees, but what about those that still have their hands but have lost function through nerve damage? Researchers at Oregon State ...

If you were to make a short list of mechanicals that can derail a race, there are a few that immediately come to mind. Chains, brakes and derailleurs are obvious, as are flats and damaged rims.

Explains how pulleys work to lift heavy weights more easily. A fixed pulley changes the direction of force, allowing for easier lifting, while a movable pulley reduces the amount of force needed to ...