More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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Approximately 25% of all reported medication errors result from some kind of name confusion.
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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.
American red squirrel
cullens sign
Loss of Indian Lands, 1850–2010
Distribution of Thunderstorms: Approximately 14.5 million thunderstorms occur each year across the ...
American Government: Roots and Reform, AP* Edition, 12th Edition