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Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

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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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In 1864, the first barbiturate (barbituric acid) was synthesized.

Pattern development in a human embryo Pattern development in a human embryo
Photograph illustrating the development of an embryo. Photograph illustrating the development of an embryo.
How many potential risks to the health of the embryo and fetus might a mother encounter in an urban ... How many potential risks to the health of the embryo and fetus might a mother encounter in an urban ...
Human embryo fetus Growth Human embryo fetus Growth
Six-week embryo showing development of hand and foot plates Six-week embryo showing development of hand and foot plates
Human embryo shortly after fertilization in the laboratory Human embryo shortly after fertilization in the laboratory
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