Modern human beings, called Homo sapiens ('wise man') have lived since about 250,000 years ago. At this time there were other species of human that were a little different to Homo sapiens. These include Homo erectus ('standing man') and Homo neanderthalensis ('man from Neanderthal'). The theory of human evolution is that humans slowly developed from other earlier species of human-like creatures. Biologists believe that Homo sapiensevolved in Africa and spread from there to all other parts of the world, replacing Homo neanderthalensis in Europe and the Homo erectus in Asia.Homo neanderthalensis, generally called Neanderthal Man, has this name because the cranium of a skull was found in the Neanderthal Valley in 1856: it was different from a modern skull.[1] Skeletons had been found in other places since then.[2] They had lived before modern humans, and had the knowledge to use tools and fire. When ancient stone tools are found, their style often shows whether they were made by Homo sapiens or whether they were made by a Neanderthal (see Palaeolithic). By the end of the Stone Age, it is believed that Homo sapiens were the only type of humans left.