Babies crawl an average of 200m a day.
212
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
You can't tickle yourself.
29
Human hair and fingernails continue to grow after death.
7
Yawns are more contagious among people with closer relationships.
163
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
One human hair can support 3 ounces.
191