Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
The spongy bone in the top of the femur changes density and organization during growth.
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A Platypus swimming in Broken River, Eungella National Park, Queensland, Australia.