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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.

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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

The universal grammar and emergent grammar viewpoint lead to very different scenarios of the evoluti The universal grammar and emergent grammar viewpoint lead to very different scenarios of the evoluti
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Key foreign policy agencies Key foreign policy agencies
Video: Pressure volume relationships - Normal inspiration and expiration

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