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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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Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

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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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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

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Gram-stained bacteria on a microscope slide. (A) Red rod-shaped cells are Escherichia coli (Courtesy ... Gram-stained bacteria on a microscope slide. (A) Red rod-shaped cells are Escherichia coli (Courtesy ...
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Bone Healing. The Bone Repair Cycle. Presentation of a Forearm Fracture Bone Healing. The Bone Repair Cycle. Presentation of a Forearm Fracture
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Video: Carpal Tunnel Syndrome

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