It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
The average person's skin weighs twice as much as their brain.
131
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161