Science
In reply to the discussion: Bill Nye's Answer to the Fermi Paradox [View all]PoindexterOglethorpe
(28,493 posts)where we are not ourselves broadcasting. So Nye might be right that we should be looking at the visible spectrum. But if aliens are currently broadcasting that way, why have our TVs not already picked that up? There's clearly a technical issue I don't understand.
Although apparently it is a total myth that civilizations some light-years out could be just now capturing our old TV signals and be watching "I Love Lucy" or "Bonanza" or whatever. Even as far out as Mars those signals would be difficult to capture and read. Light years out? Essentially impossible, even if they knew exactly what needed to be done to turn them into something like the original picture and sound.
The other huge issue is, despite Bill Nye's belief to the contrary, is that any intelligent species is not going to last forever. It will evolve, build its civilization, and eventually go extinct.
Some people believe that any advanced technological civilization will inevitably destroy itself before it makes it to other stars.
But there are other problems that no one seems to address. What if a highly intelligent species simply does not become technological and try to leave its planet? What if it evolves, say, under ice such as Europa or under a planet covering dense cloud like Venus? What if their vision is such that they can't really see the stars in the night sky?