The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Human hair and fingernails continue to grow after death.
7
Every human spent about half an hour as a single cell.
144
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
The average sperm cell swims at 8 inches per hour.
4
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111