Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
94
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Your thumb is about the same size as your nose.
124
Babies crawl an average of 200m a day.
212