aeolithic period is characterized by simple bands of hunters. They did not know how to grow crops and raise livestock, not did they build houses. Shelters of skins laid over bones may have been used, but MAINLY the people were cave-dwellers or wandering groups of hunters.The Palaeolithic period was also the time of the "Ice Ages" - times when the EARTH's climate cooled, and glaciers spread over much of Europe. At such times the wandering tribes moved southward, then moved BACK as the weather warmed up again, probably over hundreds and thousands of years.The Mesolithic period, ROUGHLY dated 10,000 BC to between 6,000 and 4,000 BC :Towards the end of the Palaeolithic, the earth's climate gradually became warmer, the Ice Ages ended, glaciers retreated and melted, and some of the cold-weather animals such as the woolly mammoth DIED out. Some tribes of hunters followed the reindeer and mammoth northwards, but others remained or moved into Europe and learned to hunt the red deer and animals of the forests which grew with the warmer weather. Hunting in a forest demands other skills than hunting in the tundra. Men developed tools and weapons made of "microliths" - small chips and flakes of sharp stone or flint which could be set into a piece of wood or bone to give a cutting implement, or which could be used as arrow points.Hope you got as much as you want