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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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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.

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