Time is relative. If you don’t believe me, get into a plank for one minute. How was that? Longest minute of your life, huh?

Gravity does a lot more than just keep us on the ground. Turns out, scientists are learning that it's a key factor in how our ...

NASA shows how space takes a toll on men and women differently. — -- With an upcoming mission to Mars, NASA is studying the ways that living in space affects both men and women. In a study ...