Homo antecessor is an extinct human species (or subspecies) dating from 1.2 million to 800,000 years ago, that was discovered by Eudald Carbonell, J. L. Arsuaga and J. M. Bermúdez de Castro. H. antecessor is one of the earliest known human varieties in Europe. Variousarchaeologists and anthropologists have debated how H. antecessor related to other Homo species in Europe, with suggestions that it was an evolutionary link between H. ergaster and H. heidelbergensis, although Richard Klein believes that it was instead a separate species that evolved from H. ergaster. Others believe that H. antecessor is in fact the same species as H. heidelbergensis, who inhabited Europe from 600,000 to 250,000 years ago in the Pleistocene.