The “cheerleader effect”, the theory that girls look more attractive in groups, is scientifically proven.
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Babies crawl an average of 200m a day.
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‘Old people smell’ is actually caused by a chemical, 2-nonenal, that old people secrete through their skin
8
The world's youngest parents were 8 and 9 and lived in China in 1910.
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It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
Senegalese women spend an average of 17.5 hours a week just collecting water.
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