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The horizontal fraction bar was introduced by the Arabs.

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania) Fossil remains of anatomically modern humans from the Czech Republic and from China (center crania)
Human Pathogens Human Pathogens
Human Fetus Human Fetus
Andy Warhol, San Francisco Silverspot, from the series Endangered Species Andy Warhol, San Francisco Silverspot, from the series Endangered Species
The divisions of the adult human brain. The divisions of the adult human brain.
Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth Genomic and fossil evidence has been used to estimate the times of divergence of human and Neanderth
Video: Steps of glucose catabolism

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