So many mammals—and such varied shapes and behaviors—throng this land that it’s hard to believe any two could have descended from the same ancestor. Nonetheless, the amphibious hippo, with its lawnmower-like diet of up to a hundred pounds (45 kilograms) of grass a night, shares a common lineage with the three-inch-long (7.5-centimeter-long) naked mole rat—a subterranean, tuber-chomping hot dog with teeth, which lives like a termite in large colonies dominated by a queen.
via Rise of Mammals Article, Mammal Evolution Information, Facts — National Geographic.