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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.