What's interesting about history is that our knowledge of it largely dependent upon how good record keeping was in that era. We don't what people were saying before the written word. We don't know what people sounded like before we could record them. We don't even know what color things were before color photographs were invented. I mean, sure we had paintings, but do you really believe that some old king never asked be painted with the gray taken out of his hair?
Fortunately, we are starting to get a sense of what things used to look like. Photoshop artists are coloring old photos to give us a sense of what our world looked like way back when. Needless to say, it was pretty cool.