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Author Question: Throughout history, all of these theoretical models have been used to primarily explain our ... (Read 131 times) |
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The horizontal fraction bar was introduced by the Arabs.