The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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The horizontal fraction bar was introduced by the Arabs.
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Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.
Rain forest in Pacific Rim National Park, Vancouver Island, British Columbia
The spatial distribution of trees in three separate stands of different ages on Vancouver Island (da
Pussy Riot Abuse Church Priests
The Mauer mandible, discovered in Germany in 1907.