*Horses Move into the Plains*
* Teeth changed to be better suited for chewing
harsh, abrasive grass. Small crests on the teeth enlarged and connected
together in a series of ridges for grinding.
*There was a simultaneous increase in body size,
leg length, and length of the face.
*The horses began to stand permanently on tiptoe (another
adaptation for speed); instead of walking on doglike pads, their weight
was supported by springy ligaments that ran under the fetlock (ankle) to
the big central toe
