The bionic hand closes slowly. Its slender metal digits whirr as they jitter into a loose fist, as though they are wrapping around an invisible baton. "OK, closed," says the test subject. The test ...

Years ago, on a vacation in Scotland, I ran a hill climb as part of a small-town games day in the Highlands. Competitors charged 2,100 feet up to the top of a looming peak, then came flying back down, ...

Scientists had hypothesized that lampreys might use body-sensing feedback (called proprioception or kinesthesia) to guide their movements in addition to descending neural connections in the spinal ...