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Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
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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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There are 20 feet of blood vessels in each square inch of human skin.