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Everyone has one nostril that is larger than the other.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.