Equus (genus) 54 million years ago (Mya). These animals had three toes on the hind feet and four on the front feet with small hooves in place of claws, but also had soft pads.<ref name="doi10.1126/science.1105458"></ref> Equids developed into larger, three-toed animals (e.g. "Mesohippus") during the Oligocene and Miocene. From there, the side toes became progressively smaller through the Pleistocene until the emergence of the single-toed "Equus". The genus "Equus", which includes all extant equines, is believed to have evolved from "Dinohippus", via the intermediate form "Plesippus". One of the oldest species is "Equus simplicidens", described as zebra-like with a donkey-like head shape.
Equus (comics) system is filled with synthetic steroids, adrenaline, and endorphins. The artificial portions of his anatomy include three grades of soft plastic that Superman had never seen before prior to his first encounter with Equus. Equus' mechanical components are powered by a system of oligotronic solar powered fuel cells controlling seven different senses, and his nervous system is powered by enough electricity to power a city block. He is capable of extending five razor-sharp claws from the knuckles of both of his hands, in a manner similar to the character of Wolverine. The claws corresponding to his fingers are approximately a