All 13 minerals necessary for human life can be found in alcohol beverages.
282
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
On average, there's 100 billion neurons in the human brain.
83
Only humans shed emotional tears.
331