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Author Question: The most important advantage of CCDs over film is that A) they can cover larger areas of the sky ... (Read 30 times) |
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.