Hear those 'scholars' talk about civilization NOT existing before the Sumarians just makes me sick any more.... Yea, suddenly civilizations just pops up with TOTAL mastery of stone cutting with broze tools, knowledge of our solar system having MORE PLANTS THAN ARE VISIBLE to the naked eye, is able to encode mathematics into HUGE structures like The Great Pyramid (which was ABSOLUTELUY NOT a tomb) that not only demonstrates the value of Pi but also calculus and the circumfrence of the Earth. And there was ZERO trial and error before this? I call BULLSHIT! :D