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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

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The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil The Land Ordinance of 1785 called for surveying and dividing the Western Territories into square mil
Population: Historic Patterns Population: Historic Patterns
Population and Settlement Population and Settlement
Population Ecology "البيئة السكان" Population Ecology "البيئة السكان"
Feeding a Baby inside the Womb Feeding a Baby inside the Womb
Human Population Growth Human Population Growth
Video: Pores and Ion Channels

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