In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
On average, there's 100 billion neurons in the human brain.
83
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Tigers can see 6 times better at night than humans.
305
The average sperm cell swims at 8 inches per hour.
4
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346