The world's shortest man measures only 21.5 inches.
73
Pain occurs when sounds are above 130 db.
124
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Yawns are more contagious among people with closer relationships.
163
You can't tickle yourself.
29
On average a woman has 4 sexual partners in her lifetime.
-143
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21