Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Cyanide works by making the human body unable to use oxygen.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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.
Sunlight shining through clouds, giving rise to crepuscular rays.
Mammatus clouds
The View from the Stratosphere
A beveled tip helps the needle penetrate skin and vein with minimal damage.