> But I wonder - had things been not much different, might we be cohabiting with an intelligent species, one perhaps tens of thousands of years ahead of us? Ali

> But I wonder - had things been not much different, might we be cohabiting with an intelligent species, one perhaps tens of thousands of years ahead of us? Aliens on our own planet? I really loved your post especially that paragraph, which could easily spawn a dozen sci-fi stories or conspiracy theories.