The Lost PowerPoint Slides (Prehistory 1.2: Thag Do Invention) Published May 6, 2008 By Mark A. Rayner Human societies existed long before the written word, but luckily for us, not before PowerPoint technology. This makes it much easier for anthropologists, historians and… Continue ReadingThe Lost PowerPoint Slides (Prehistory 1.2: Thag Do Invention) Comments closed