"Homo neanderthalensis", generally called Neanderthal Man, was discovered when the cranium of a skull was found in the Neanderthal Valley in 1856. It was different from a modern human skull so scientists believed it was from a new species. Entire Neanderthal skeletons have been found in other places since then. Neanderthals existed before modern humans, and knew how to use tools and fire. When ancient stone tools are found, their style often shows whether they were made by "Homo sapiens" or Neanderthals (see Palaeolithic). By the end of the Stone Age, it is believed that "Homo sapiens" were the only type of humans left.