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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.