The earliest traces of primates are found in rocks dating about 70 million years old. These rocks also contain the remains of the last Dinosaurs. By 45 million years ago, these early primates had evolved into Lemur-Like forms and further into Monkey-like forms, such as Aegyptopithecus, by around 35 million years ago. Early Miocene Apes, called Dryopithicines, followed shortly and readied the primate line for its next great breakthrough: bipedialism. The genus Australopithecus appeared around four million years ago. These upright primates paved the way for the more advanced tool-makers and first examples of the homo genus: Homo habilis. Next came Homo erectus. Once considered the first upright men. Erecticines were robust hominids who eventually gave way to the Neanderthals, often thought of as a dead-end in the road to the human line, as well as Cro-magnon, (Homo sapiens) the earliest example of our own species.