36 million years ago, pigs appeared on the earth. The direct ancestor of the pig came from Southeast Asia, the so-called primitive pig. More than 8000 years ago, humans began to domesticate wild boar and become domestic pigs.

Pigs themselves belong to mammals, Artiodactyla and Pig Family.

In the early Eocene (50 million years ago), progressive ungulates and cloven-hoofed animals appeared. In ancient times, cloven-hoofed animals differentiated from ankles, and all pigs evolved from the suborder Porcine. Now there are only three families: Porcine, Hippopotamus and Cicadellidae.

Pigs are one of the living things of Bovidae (pigs and hippos are closely related).