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Author Question: The year without a summer may have been caused by ____. A) soot from coal fires B) particulate ... (Read 53 times) |
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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There are 20 feet of blood vessels in each square inch of human skin.
The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a