Archaeotherium (αρχαιοθήριον, meaning `ancient beast`) is an extinct genus of entelodont artiodactyl endemic to North America during the Eocene and Oligocene epochs (38—24.8 mya), existing for approximately {Mya|30.8-24.8|million years}. Archaeotherium was about 1.2m tall at the shoulder and around 2m long and weighing around 270kg.....