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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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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There are more bacteria in your mouth than there are people in the world.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
The respiratory system and the process of gas exchange