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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Energy-flow diagram for a Georgia salt marsh. Energy-flow diagram for a Georgia salt marsh.
Eastern skunk cabbage, an endothermic plant, can melt its way up through spring snow cover Eastern skunk cabbage, an endothermic plant, can melt its way up through spring snow cover
Hot Spring Hot Spring
Rich Energy Deposits Rich Energy Deposits
Eating Breakfast Means More Energy and Fewer Calories throughout the Day Eating Breakfast Means More Energy and Fewer Calories throughout the Day
Water is vital for many body functions, but it isn’t stored in the body Water is vital for many body functions, but it isn’t stored in the body
Video: Egg and Sperm Formations in Animals Animation

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