For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Your fingernails grow faster in summer.
744
On average, there's 100 billion neurons in the human brain.
83
A man's beard grows fastest when he anticipates sex.
239
We share 70% of our DNA with a slug.
218
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15