Banging your head against a wall uses 150 calories an hour.
57
The average person's skin weighs twice as much as their brain.
131
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
We blink 25 times a minute.
51
The human body contains over a billion miles of DNA.
147
You can reschedule your sleeping pattern by not eating 12-16 hours before you want to be awake. Upon eating after this time period, your internal clock will reset to a new day, with the time of your first meal being interpreted as "morning".
11
From the age of thirty, humans gradually begin to shrink in size.
1