It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
47% of people have a nightmare at least once a month.
186
There's an isolated tribe in Zimbabwe where the people have only two toes, dubbed the 'ostrich people'.
10
Babies crawl an average of 200m a day.
212
In a year, the average person walks four miles to make his or her bed.
56
Only 2% of the Earth's population are natural redheads.
13
A study had men report their own penis size, and the average was found to be 6.1-6.5 inches. A subsequent clinical study actually measured penises, and found the average size to be 5.1-5.7 inches.
-3
Women who are romance novel readers are reported to make love 74% more often with their partners than women who do not read romance novels.
136