The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Babies crawl an average of 200m a day.
212
Every human spent about half an hour as a single cell.
144
It takes approximately 12 hours for food to entirely digest.
93
You can't tickle yourself.
29
Yawns are more contagious among people with closer relationships.
163
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139