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The diagram below show the development of the horse over a period of 40 million years. The evolution of the horse, with particular emphasis on the changing foot structure. The pictures displays about the horse's evolution from 40 million years ago up to the present, giving specific attention to the foot structure.
The first of the kind of the horse species is called Eohippus which appeared 40 million years ago. Its foot had five toenails. After 10 million years since...