The human brain doesn't stop developing until about 25 years old.
102
Your thumb is about the same size as your nose.
124
The average sperm cell swims at 8 inches per hour.
76
One human hair can support 3 ounces.
191
Our Right Lungs takes more air than our left lung.
194
When you take a step, you are using up to 200 muscles.
886
It takes about 20 seconds for a red blood cell to circle the whole body.
102