The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The human brain uses approximately as much energy as a 10 watt light bulb.
120
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Poor eyesight (myopia) is associated with higher IQ.
232
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
All 13 minerals necessary for human life can be found in alcohol beverages.
282
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
A human being loses an average of 40 to 100 strands of hair a day.
133