1. An informative Powerpoint about the Stone Age

3. Photo courtesy of Tadius magazine@flickr
Photo courtesy of Tadius - granted under creative commons licence - attribution

19. Photo courtesy of simplyla@flickr. com , Tann@flickr
Photo courtesy of , - granted under creative commons licence - attribution

21. What did they do?

22. Photo courtesy of Lennart Tange @flickr
Photo courtesy of Lennart - granted under creative commons licence - attribution