The word "mammal" is modern, from the scientific name Mammalia coined by Carl Linnaeus in 1758, derived from the Latin mamma ("teat, pap"). All female mammals nurse their young with milk, which is secreted from special glands, the mammary glands. According to Mammal Species of the World, 5,416 species were known in 2006. These were grouped in 1,229 genera, 153 families and 29 orders. In 2008 the IUCN completed a five-year, 1,700-scientist Global Mammal Assessment for its IUCN Red List, which counted 5,488 accepted species. COUNT 4
QSN1 Who coined the name "mammal" from the scientific name Mammalia? ANS1 Carl Linnaeus QSN2 What do all female mammals have in common when they have children? ANS2 nurse their young with milk QSN3 How many mammals were known to exist up to 2006? ANS3 5,416 QSN4 How many families did mammals consist of as of 2006? ANS4 153 families