We are all mammals! Mammals are warm-blooded vertebrates (animals with backbones), who breathe air, grow hair at some stage of their lives, and nourish their babies with milk. Mammals also have larger, more developed brains than other animals. There are over 4,000 mammal species on earth: the fastest long distance runner is the Pronghorn antelope which can sustain a speed of 45 mph for more than 4 miles, and the slowest mammal we actually have here at the Zoo! Can you guess which mammal it is?
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