I love this, and my lottery dream consists of funding a scalable, interactive, tag-based version that allows layering of different topics. As a schoolteacher, the woolly mammoths/pyramids moments are great for my 12/13 year old students. Revolutions, wars, social movements, the arts, sports, science, etc could all be toggled, with links to Wikipedia or potentially other sources for each entry. Potentially crowd-sourced with moderation. I also dream of having a classroom tool version that students could build.