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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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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The human body produces and destroys 15 million blood cells every second.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Animal Symmetry
Animal Love
A hair is an array of many α-keratin filaments, made up of the substructures