Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
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The horizontal fraction bar was introduced by the Arabs.
Flame and gravity
How is the allegory of the cave a metaphor for achieving intellectual insight and wisdom?