id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
en-wikipedia-org-1591		Mammal - Wikipedia			.html	text/html	23417	3843	67	Mammals (from Latin mamma "breast") are a group of vertebrate animals constituting the class Mammalia (/məˈmeɪliə/), and characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These were grouped into 1,229 genera, 153 families and 29 orders.[3] In 2008, the International Union for Conservation of Nature (IUCN) completed a five-year Global Mammal Assessment for its IUCN Red List, which counted 5,488 species.[4] According to research published in the Journal of Mammalogy in 2018, the number of recognized mammal species is 6,495 including 96 recently extinct.[5]	./cache/en-wikipedia-org-1591.html	./txt/en-wikipedia-org-1591.txt