The presented infographic depicts the evolvement of the horse over the period of 40 years, with the concentration on its foot structure
Overall, the horse has grown more substantial in size with pronounced evolution of body parts over the course of 40 million years. Another worth-mentioning feature is that its toes have been transformed into one hoof.
Looking at the two first evolutionary phases, the horse existing 40 million years ago named Eohippus had a small body with a short tail and tiny round-edged ears, and its foot including four distinct toes which were slender. Besides, the horse found 10 million years later called Mesohippus had a body which was nearly two times larger than the former those one. It was also had more muscular with a longer tail and more prominent ears. Furthermore, there had been an additional tuft of hair on its neck. Compared to its ancestor, each of their feet had lost one toe, and the middle one had grown noticeably larger.
Regarding the last 15 million years, the horse, also known as Merychippus, still extended in size and possessed 3-toe paws. In comparison with that one in 30 millions years ago, its crest became denser and its 3 digits became heftier, especially the prominent middle one. Finally, the modern horse has been taller, larger, fully fledged with full mane and a lot more hair on tail. Moreover, the separate digits have merged into a single hoof, and the foot has much more developed fetlocks, which is capable of supporting a more enormous frame