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 average person will go on a date at least 100 times before they finally marry.
33
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
If the human eye was a digital camera, it would have 576 megapixels.
25
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
One human hair can support 3 ounces.
191
Obsessive nose picking is called Rhinotillexomania.
101