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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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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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