And by aliens I mean, outer space creatures and UFO. For whatever reason all UFO sighting footage looks either fake or like recorded with a Casio keyboard. And I find hard to believe we don’t have any decent footage of them with all the surveillance and technology we have now.
Edit: 🍿
I touched on this a bit here. But basically I think the fermi paradox essentially just tells us that life, multicellular life and intelligent life are much rarer than we think they are.
I don’t know if nuclear engines would change too much when it comes to space travel between the stars. I mean let’s say you could reach even 1% of the speed of light (which is already bonkers honestly). That’s still quite slow all things considered. Just to cover, say 1% of the Milky Way’s diameter (100.000 light years) would be a distance of 1000 light years. With 1% light speed, that would take you 100.000 years. That’s simply not viable.
Iirc a nuclear rocket would cut travel time down to centuries between stellar systems. While cruising the galaxy in one go might not be feasible, travelling to a nearby system would be.
Honestly even centuries is like… a crazy timescale for space travel. There’s so many things that can go wrong and there’s nothing saving you in space. Generation ships is a cool idea but it is that - just an idea, at this point.