von Neumann probes, Dyson spheres, exploratory engineering and the Fermi paradox

von Neumann probes and Dyson spheres: what exploratory engineering can tell us about the Fermi paradox Talk by Stuart Armstrong, at the Oxford physics department Abstract: The Fermi paradox is the contrast between the high estimate of the likelihood of extraterritorial civilizations, and the lack of visible evidence of them. But what sort of evidence should we expect to see? This is what exploratory engineering can tell us, giving us estimates of what kind of cosmic structures are plausibly construct