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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.