Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
Our brains have a negativity bias and will remember bad memories more than good ones.
15
You forget 90% of your dreams.
256
The human eye blinks an average of 4,200,000 times a year.
233
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
A man's beard grows fastest when he anticipates sex.
239
Every human spent about half an hour as a single cell.
144