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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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The average office desk has 400 times more bacteria on it than a toilet.
Insulin Types and Duration of Action
There are many types of adaptive devices: (A) a toothbrush; (B) a reaching stick; (C) a shoe holder; ...