Major climatic changes occurred during the Miocene (Mio - middle; cene - recent).
The world became a cooler, drier place. As a result, forests shrunk and grasslands spread.
The animals of the Miocene adapted to this changing world. This epoch is characterized by a major
"modernization" of many animals--they began to resemble the animals of the present. Some horses acquired
the high-crowned teeth needed to consume abrasive grasses.
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