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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.
Some organisms used as models in genetic research
Type C killer whales in the Ross Sea. The eye patch slants forward.