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Did you know?
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.