The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
A feral horse herd in the western United States
Saline Groundwater in the United States
Sources of Energy in the United States
Continental United States Hurricane Strikes from 1950-2011
Guide to Major Massage Therapy Organizations in the United States*
What's the Difference Between England, Great Britain, and United Kingdom?