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Did you know?
Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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There are 60,000 miles of blood vessels in every adult human.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.