It is not possible to tickle yourself. The cerebellum, a part of the brain, warns the rest of the brain that you are about to tickle yourself. Since your brain knows this, it ignores the resulting sensation.
Infants spend more time dreaming than adults do.
Finger Nails grow about 3 times faster than toe nails
The palms of your hands and the soles of your feet cannot tan, or grow hair.
Women blink nearly twice as much as men.
Fingernails grow nearly 4 times faster than toenails.
Our eyes are always the same size from birth.
Every person has a unique tongue print
A human being loses an average of 40 to 100 strands of hair a day.