The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
104
Women have a slightly higher average IQ than men.
164
35% of the people using personal ads for dating are already married!
23
Roughly a quarter of the world's people live in China.
50
Nearly 10% of American households dress their pets in Halloween costumes.
36
Intelligent people have more zinc and copper in their hair.
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