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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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Your heart beats over 36 million times a year.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Two equivalent ways of drawing a phylogeny Two equivalent ways of drawing a phylogeny
Joseph Moore and His Family (1839), by Erastus Salisbury Field, reflects the emerging middle-class f Joseph Moore and His Family (1839), by Erastus Salisbury Field, reflects the emerging middle-class f
Capacitors in parallel and an equivalent capacitor Capacitors in parallel and an equivalent capacitor
Equivalent Trig Expressions Equivalent Trig Expressions
Equivalent Trig Expressions Equivalent Trig Expressions
Equivalent Trig Expressions Equivalent Trig Expressions
Video: Biological organic compounds

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