KIDS TRIVIA

Detailed explanation-1: -By 55 million years ago, the first members of the horse family, the dog-sized Hyracotherium, were scampering through the forests that covered North America.

Detailed explanation-2: -By the late Oligocene, Mesohippus had evolved into a somewhat larger form known as Miohippus. The descendants of Miohippus split into various evolutionary branches during the early Miocene (the Miocene Epoch lasted from about 23 million to 5.3 million years ago).