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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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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The horizontal fraction bar was introduced by the Arabs.