Posthuman Blues

Wikipedia on Richard Shaver, whose mythos shares some general parallels with my own "Indigenous Hypothesis":

Palmer wrote to Shaver, asking how he had learned of Mantog. Shaver responded with a 10,000 word document entitled "A Warning to Future Man." Shaver wrote of tremendously advanced pre-historic races who had built cavern cities inside Earth before abandoning Earth for another planet. Those ancients also abandoned some of their own diseased offspring here, who degenerated over time into a population of mentally impaired sadists known as Dero--short for detrimental robots.

And yes, I plan on "going there": underground bases, space colonies, etc. Shaver's audacity certainly hit a nerve, even if we're loathe to admit it.