On average, there's 100 billion neurons in the human brain.
83
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
29
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161
Pain occurs when sounds are above 130 db.
124