The category archaic human lacks a cohesive and universal definition. According to one description, Homo sapiens is a single species encompassing several subspecies that comprise the archaics and modern humans. Under this definition, modern humans are referred to as Homo sapiens sapiens and archaics are likewise labeled with the prefix "Homo sapiens". Other taxonomists choose not to consider archaics and modern humans as a single species but as several different species. The separating lines that distinguish modern humans from archaic H. sapiens and archaics from H. erectus are vague. The earliest known fossils of anatomically modern humans such as the Omo remains from 195,000 years ago, H. sapiens idaltu from 160,000 years ago, and Qafzeh
