Description:
This title briefly mentions dinosaurs, but spends more time comparing and contrasting extinct North American mammals that lived about 10,000 years ago to their close animal relatives that are alive now. Examples include the saber-toothed cat and the tiger; Mesohippus and the modern horse; giant ground sloths and modern sloths; Trigonias to the modern rhino; and mammoths, mastodons, and elephants.
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