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
The human brain has the capacity to store everything that you experience.
4k
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The average person will go on a date at least 100 times before they finally marry.
33
A person can live without food for about a month, but only about a week without water.
156
The largest cell in the human body is the female egg and the smallest is the male sperm.
682