You can't tickle yourself.
29
The average person will go on a date at least 100 times before they finally marry.
33
Every human spent about half an hour as a single cell.
144
By weight, Bone is five times stronger than steel.
417
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
A man's beard grows fastest when he anticipates sex.
239