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.
Did you know?
The strongest synthetic topical retinoid drug available, tazarotene, is used to treat sun-damaged skin, acne, and psoriasis.
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Thyroid conditions may make getting pregnant impossible.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Mental health
The phases and ionic basis of an action potential.
Despite the globe’s vast social change, people all over the world continue to make race a ...