Physics for Your Feet

A new shoe promises more efficient running by taking a page from Isaac Newton

Running Man

Dean Karnazes grabbed the headlines, but Mississippi native SAM THOMPSON, 25, nabbed the record last summer with little fanfare, becoming the first person to blitz 50 marathons in 50 days in 50...

Pace Setter

With the latest iPod evolution, our human guinea pig turns on, tunes in, and...drops out?