In 1864, the first barbiturate (barbituric acid) was synthesized.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
Zonal wind speeds on Uranus. Shaded areas show the southern collar and its future northern counterpa
Posterior views of H. erectus, Neandertal, and modern H. sapiens show differences in vault shape.
Bone fractures that occur before death show signs of healing. The process of fracture healing starts
Rank-order correlations show that differential consistency remains high from childhood through late ...
Chart showing average yearly dose of radiation from natural and human-made sources
Harry and Gus fish the same lake together from the same boat. Each morning Harry typically ...