Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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