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Author Question: Consider a situation where two moving objects collide, stick to each other, and move off together. ... (Read 32 times) |
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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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.
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One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.