Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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The horizontal fraction bar was introduced by the Arabs.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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The average adult has about 21 square feet of skin.
Border Collie
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Pima Indian woman receiving an eye exam.
A woman in a net on a Congo shore. Although the importation of slaves was illegal after 1807, histor