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Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.
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There are 20 feet of blood vessels in each square inch of human skin.