The human brain doesn't stop developing until about 25 years old.
102
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
There's 100 trillion good bacteria living in your body.
17
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
There are about 1,400 different species of bacteria in your belly button.
10
Within three days of death, the enzymes that once digested your food begin to eat you.
22
You see your nose at all times, your brain just chooses to ignore it.
30