Sleeping on your stomach can induce weirder, scarier, and sexier dreams.
22
The average sperm cell swims at 8 inches per hour.
76
Your body is creating and killing about 2.4 million red blood cells per second.
17
Your heart rate can rise as much as 30% during a yawn.
69
More people have a phobia of frogs than rats.
41
The human heart creates enough pressure to squirt blood 30 ft.
37
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Most lipstick contains fish scales.
37