It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
119
About 3000 years ago, most Egyptians died by the time they were 30!
18
47% of people have a nightmare at least once a month.
186
Babies' eyes do not produce tears until the baby is approximately six to eight weeks old.
58
More redheads are born in Scotland than in any other part of the world.
85
