Roughly a quarter of the world's people live in China.
50
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
Senegalese women spend an average of 17.5 hours a week just collecting water.
27
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 mature much faster than men.
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