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) completely disappeared from the face of the Earth (including his wife, Lois Lane), is traced to an unspecified country in the Middle East. Investigating, Superman intervenes in a civil war by using his speed to snatch all the guns from a group of men fighting one another. The fighting continues however, and in his continued quest to put an end to it, Superman confronts Equus, a large, monstrous, cybernetically enhanced humanoid creature whose claws are capable of piercing Superman's skin. General Nox, the leader of the rebels, puts an end to the fight between the two beings, telling Superman that