The horizontal fraction bar was introduced by the Arabs.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
Changes in boreal forest composition along a chronosequence in Quebec. Dates refer to the year of th
Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t
American Foreign Trade, 1790–1812
American soldiers—some of them regulars in deep blue uniforms, others in buckskin cowboy outfits— fi
Photo of a sign taken at an emissions test facility.