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Author Question: In a contest, two tractors pull two identical blocks of stone the same distance over identical ... (Read 4065 times) |
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Blood is approximately twice as thick as water because of the cells and other components found in it.