Every human spent about half an hour as a single cell.
144
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The average person will go on a date at least 100 times before they finally marry.
33