Just maybe it defies physics to travel fast enough to cross vast distances in the life of an extraterrestrial or humans for that matter. Intergenerational travel would be vastly complex and expensive. My guess is economics is as universal as physics. Then again, I swear my dog is an alien, at least acts like one. So what do I know?
Get a cat and then Your dog won’t seem strange anymore
Really? Well I know my wife is one because no human acts like she does.
She is a Finlander..and that explains Putin. He is nothing but a hybrid Finlander.
ETs treat Earth like we treat inner city Chicago. They pretend it doesn’t exist, and when driving(flying) through they roll the windows up and lock the doors, then floor it outta there.
An AI probe could hibernate for thousands of years as it crossed interstellar distances. I could see a high-tech civilization sending out thousands of such probes (like we sent out Voyager with a message), if only to be able to tell other civilizations "We were here".