TKAV....not trying to discredit your knowledge of physics but just throwing this out there. some have the attitude that if we can't do it then it can't be done. but i see this as human arrogance. why couldn't advanced life forms have propulsion systems that embrace laws of physics that we couldn't even begin to comprehend that would enable them to travel at many,many times the speed of light? couldn't our laws of physics as we understand them pale in comparison to what exists in the universe? again not trying to argue with you but rather discuss the fact that what we as humans understand about the physics of the universe could just be the tip of the iceberg?
Its less about what we dont know and more about statistics. everything out there is soooo big that its unlikely that anything would come visit us, Even accidently. thats not to say we wont eventually go visit things out in the cosmos, but rather , the statistical probability of us contacting one race or another is so tiny its really just a crap shoot. meaning decidedly choosing to contact race x vs. race y.
The funny thing about Physics is that If the laws of Physics were any different than they are we wouldnt be here to observe them .
I'm sure there will be revolutions in our understanding of the universe, many many times over. However we do have at least a basic set of facts, that can be experimentally tested that say we do know that a few things are absolutely true.
I'd bet my own life that theres other intelligent life in the universe. and i believe we will finally contact one of them in the near future(next 100 years). but this will be done via radio signal not actual Physical contact. Although if they are much more advanced that could set the stage for a visit.
A little while back a Phycisist came up with an equation showing how you would manipulate spacetime to literally build a star trek warpdrive. Now this is only an exercise in mathmatics because some of the variables required are physical impossibilities, so far.
Alcubierre drive - Wikipedia, the free encyclopedia
So is it that far fetched to think someone somewhere solved some of these problems? not at all. but in space you literally have in infinate number of directions to travel in. the odds of coming here are extremely slim.
one of the problems i have with the claims of ET visiting is an astounding lack of evidence. which can be expected dealing with an advanced species. however if they were that advanced, there would be no claims made as we would have no idea theyre even here. so that in turn brings us back to the idea that outstanding claims require outstanding evidence.
I dont mean to sound like a hargenger of sorrow, but most people grossly underestimate the challange of exploring the cosmos, for any species at any level of advancement. its not an impossibility, its just mind shatteringly extensive hurdles that must be crossed.
ive been slightly scatterbrained typing this but i hope i conveyed my thoughts enough to follow.