Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You can't tickle yourself.
29
The average person's skin weighs twice as much as their brain.
131
If the human eye was a digital camera, it would have 576 megapixels.
25
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14