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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Coca-Cola originally used coca leaves and caffeine from the African kola nut. It was advertised as a therapeutic agent and "pickerupper." Eventually, its formulation was changed, and the coca leaves were removed because of the effects of regulation on cocaine-related products.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.