The average person's skin weighs twice as much as their brain.
131
Your thumb is about the same size as your nose.
124
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
20
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
The human body contains over a billion miles of DNA.
147