Your thumb is about the same size as your nose.
124
The human brain doesn't stop developing until about 25 years old.
102
Chewing gum boosts your brain power.
285
One human hair can support 3 ounces.
191
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
When you take a step, you are using up to 200 muscles.
886
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515