All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
Relative sizes of the sporophyte and gametophyte generations of bryophytes, ferns, and seed plants.
