Human and Neanderthal populations overlapped at least twice in their history Some previous estimates had placed the first interspecies liaison much earlier, before the emergence of these features. The new DNA sequence shows it actually happened in the middle of an age called the Initial Upper Palaeolithic, when there was an explosion of modern human culture.
Australopithecus robustus, homo habilis, homo erectus, homo sapiens neanderthalensis, homo sapiens sapiens all walking to show their height and structure, as well as diagrams of their brains above each with the cortex coloured, to show how the brain increased in size.
homo erectus.....The Acheulean tool tradition is associated with the Homo Erectus way of life. The stone tools were largely made of quartz. Bone tools and wooden tools like wooden spears have also been discovered. There is evidence of big game hunting which indicates that there must have been collective cooperative hunting. The Homo Erectus seem to be cave-dwellers. An important advancement is that there is evidence of the use of fire.