Most recent forms of mammals evolved during the Pleistocene (Pleisto - most; cene - recent)
Epoch. A dramatic "event" of this time period was the last "Ice Age." The Pleistocene Epoch also was the last time
that a great diversity of mammals lived in North America, including mammoths, mastodons, giant sloths, several
llama-like camels, and tapirs. And it was the last epoch native horses lived in North America. The horses were
both abundant and diverse.
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