Most people smile when they are frustrated, according to a study.
15
People in parts of Western China put salt in their tea instead of sugar.
16
Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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About 3000 years ago, most Egyptians died by the time they were 30!
18
Females learn to talk earlier, use sentences earlier, and learn to read more quickly than males.
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On average, men's noses are 10% larger than women's.
12
One in 500 humans has one blue eye and one brown eye.
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