The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.
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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
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There are 20 feet of blood vessels in each square inch of human skin.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Roe deer in a grassland area.
Lungs: RUL = Right Upper Lobe, RML = Right Middle Lobe, RLL = Right Lower Lobe, LUL = Left Upper Lob
Hand position for the cradle. Overlap the last three fingers of your left hand on the last three ...