Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
A human being loses an average of 40 to 100 strands of hair a day.
133
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
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
There's 100 trillion good bacteria living in your body.
17
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
Your thumb is about the same size as your nose.
124