On average, there's 100 billion neurons in the human brain.
83
You can't tickle yourself.
29
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
There are about 255 babies born worldwide every minute.
46
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Mushrooms are more closely related to humans than they are to plants.
47
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13