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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The human body produces and destroys 15 million blood cells every second.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.