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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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Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
A theoretical photosynthetic response curve.
Tame deer wandering the streets of Miyajima, Japan
The oxygen sensor provides a quick response at the stoichiometric air–fuel ratio of 14.7:1.
The humoral and cellular immune response. At the left is the humoral (or B-cell mediated); at the ...
Average Annual Growth Rates of Population by Country Group
In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv