Numbers Don't Lie
The offspring of a male horse and a female donkey is called a ______.
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The offspring of a male horse and a female donkey is called a hinny.
The earliest ancestor of the horse is estimated to have lived 55 million years ago.
Around 55 million years ago, the first members of the horse family were scurrying through the forests that covered much of North America. These hoofed mammals were called Hyracotherium, one of which was about as big as a medium-sized dog.
With its arched back, raised hindquarters, four functional hooves on each front foot, and three on each hind foot — unlike the unpadded, single-hoofed feet of modern equines — this early ancestor was quite unlike modern horses as we know them. Paleontologists initially thought the species entirely unrelated to equines, until fossils were found that showed a link between Hyracotherium and later extinct horses.
For more than half their history, the majority of horse species were small, forest browsers, eating leaves and twigs from trees and shrubs. Then, about 20 million years ago, new horse species began rapidly evolving when changing climate conditions allowed grasslands to expand. Some of these new grazers grew to much larger sizes, becoming more like the horses we’re familiar with today.
