For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
The human sigh acts as a physiological reset button.
23
If you hold farts in during the day, they'll just come out when you sleep.
16
The average sperm cell swims at 8 inches per hour.
76