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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Excessive alcohol use costs the country approximately $235 billion every year.