Medically reviewed by Alicen Nelson MD, MPH The navel, also known as the belly button or umbilicus, is a small, round, or ...

To unlock a stronger upper body, get creative with your lower body. Our Workout of the Month is all about variations on classic moves. Short on equipment? Can't get to the gym? This full-body ...

“The children are sad when there is no ... a human’s energy when resting; by comparison, an ape’s brain requires only 8 percent. This means that from the time of H. erectus, the human body ...