If we expect to see the &quot;brightness of the blackbox caused by the radiation of a Type III Kardashev Civilization&quot;, and we inspect galaxies that are maybe millions of light-years away from us, would we not be looking at how did those galaxies look millions of years ago?<p>That is, maybe there are Type III Kardashev Civilizations and their usage of the energy of their galaxy in fact radiates energy that would be visible to us... except that they&#x27;ve evolved to that point much later that the light we&#x27;re receiving since it takes millions of years for that light to reach us.<p>In those millions of years they could very well have reached that technological level, but it will take some more millions of years for that to reach us... by that time mabye that Civilization doesn&#x27;t exist anymore... Maybe our civilization doesn&#x27;t exist anymore...<p>In this case we extract information from the radiation that comes from those galaxies, and the information is too slow to travel such vast distances, since it can&#x27;t go faster than the speed of light.<p>In summary, we&#x27;re looking for ANCIENT Type III civilizations.