Astonishing flying snakes of Asia defy gravity without wings, launching from trees and flattening their bodies to glide.

Your sleep position matters. Cardiologists warn that sleeping on your left side can stress an aging heart. Discover the ...

Running a single mile — at about a 10-minute pace — consists of 1,700 steps. And each one of those steps produces ground reaction forces of about two and a half times your body weight. And you know ...