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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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There are 60,000 miles of blood vessels in every adult human.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.