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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

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A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

The mark-recapture technique is often used to estimate population size. The mark-recapture technique is often used to estimate population size.
STR DNA Analysis Technique STR DNA Analysis Technique
Skilled nursing facilities provide care for patients requiring longer stays than hospitals allow. Skilled nursing facilities provide care for patients requiring longer stays than hospitals allow.
The Two-Step Persuasion Technique to Encourage Community Service The Two-Step Persuasion Technique to Encourage Community Service
Redrape the back, face the head of the table, and apply passive touch as finishing technique. Gently ... Redrape the back, face the head of the table, and apply passive touch as finishing technique. Gently ...
Diaphragm relaxation technique. (A) Place the thumb on the metatarsal head of the big toe. (B) Bend ... Diaphragm relaxation technique. (A) Place the thumb on the metatarsal head of the big toe. (B) Bend ...
Video: Structures that affect circulation - kidneys, blood volume and venous tone

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