In Russia’s Yakutia region, mammoths and other ice-age creatures once roamed the land ... Some of the oldest mammoth fossils have been hidden in the permafrost for centuries.

Although the bears in ice age North America were the biggest and most powerful carnivores ... the exaggerated curved tusks sported by their mammoth cousins. Mastodons were homegrown elephants ...

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Back when the Earth was being overrun by glaciers, and animals were scurrying to save themselves from the upcoming Ice Age, a sloth named Sid, a woolly mammoth named Manny, and a saber-toothed ...