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Illicit drug use costs the United States approximately $181 billion every year.

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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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Cyanide works by making the human body unable to use oxygen.

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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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Maternal age is the major risk factor for autosomal trisomies of all types. By age 42, about one in Maternal age is the major risk factor for autosomal trisomies of all types. By age 42, about one in
Video: Apicomplexan life cycle Animation

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