Losing Common Knowledge
We may generally accept that human knowledge doubles at an unprecedented rate. In some fields that happens every six months. Some fields nearly every week. At times I despair for the knowledge that we've lost: The library at Alexandria; Mayan writings destroyed by the church; for that matter written history (even with symbols) destroyed by conquering armies across the planet. I'm not an archaeologist or anthropologist, but I do love studying their work. Maybe that's another degree coming. So you'll have to forgive me if the dating of the graphics posted here disagree with one field expert or another. I'm just thinking with my fingers on the keyboard, and some of these symbols are probably more accurate if described in a range of years. There is, at least to me, an amazing correlation and symmetry that crosses continents and cultures. Long before written language we humans communicated with symbols....