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Author Question: What is the 'atmospheric window'? A) The range wavelengths of solar radiation that most easily ... (Read 222 times) |
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.