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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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