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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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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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Medication errors are more common among seriously ill patients than with those with minor conditions.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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A schematic view of ribosome subunit rotational motions, based on crystal structures of ribosomes A schematic view of ribosome subunit rotational motions, based on crystal structures of ribosomes
A schematic, and somewhat hypothetical, view of SNARE–pin fusion A schematic, and somewhat hypothetical, view of SNARE–pin fusion
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