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Author Question: In a contest, two tractors pull two identical blocks of stone the same distance over identical ... (Read 3312 times) |
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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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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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.
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Blood is approximately twice as thick as water because of the cells and other components found in it.