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There are more bacteria in your mouth than there are people in the world.
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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 first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
![When Union troops pushed toward Richmond in June of 1862, these slaves crossed the Rappahannock Rive](https://biology-forums.com/gallery/47/medium_376021_22_08_15_1_40_22_22353567.jpeg)
![In 1891 William Dean Howells championed the poetry of Emily Dickinson: “This poetry is as characteri](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_04_22438726.jpeg)