Here's a new way to look at JUST how hard it is to CREATE A HUMAN.

According to a new study out of Duke University, being pregnant is so tough on a woman's body it's like running a daily marathon. Your body is working so hard and needs so many calories it's like you're an endurance athlete.

They also found that pregnancy maxes out the body's energy . . . if it were any tougher, it wouldn't even be physically possible. In other words: Just give that pregnant lady your damn seat. 

(New York Post)