Every human spent about half an hour as a single cell.
144
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Babies crawl an average of 200m a day.
212
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Early American humans hunted car-size armadillos and used their shells for houses.
12
The human eye blinks an average of 4,200,000 times a year.
233
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197