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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Your heart beats over 36 million times a year.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.