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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The human body produces and destroys 15 million blood cells every second.