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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.
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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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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.