An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Every human spent about half an hour as a single cell.
144
The human brain uses approximately as much energy as a 10 watt light bulb.
120
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15