After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
In one day, adult lungs move about 10,000 litres of air.
11
The human sigh acts as a physiological reset button.
23
The average sperm cell swims at 8 inches per hour.
76
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
The human brain doesn't stop developing until about 25 years old.
102
