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Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

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There are more sensory neurons in the tongue than in any other part of the body.

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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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Richmond, Virginia, lies in ruins in April 1865 at the time of Lincoln’s visit—and a few days before Richmond, Virginia, lies in ruins in April 1865 at the time of Lincoln’s visit—and a few days before
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The U.S. military uses its own marking system to identify explosive hazards (left), chemical hazards ... The U.S. military uses its own marking system to identify explosive hazards (left), chemical hazards ...
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