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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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The average adult has about 21 square feet of skin.
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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.