Is there any true evidence of alien activity in the universe?
455827
Because of the great distances involved, the most reliable way we have to look for aliens is to search the sky for the different forms of electromagnetic radiation that a technologically advanced society might generate, such as radio waves.  SETI (Search for Extra Terrestrial Intelligence) does just this, looking for anything that might be interpreted as signs of intelligence in the background noise that otherwise permeates the universe.  Nothing conclusive so far, but absence of evidence is not evidence of absence.  With the universe as unimaginably large as it is, odds are something is out there.
147379
Yes, aliens are true. There is the most famous documented alien abduction case ever - Whitley Streiber's.
710945
Although there is evidence of alien visitation dating back to Ancient Egypt, this seems to show that aliens have been watching our development for a long time. But it's only in the last 50 or so years that it's really come to the world's attention. \n\nConveniently it is only in the last 50 years that nuclear technology has been developed. \n\nMaybe they are observing us with the future intention of invasion, or maybe they come here just to say "hi" in the spirit of exploration and discovery. But if the second were true, why not reveal themselves publicly for the world to see?
281970
it's a hard question to answer, cuz same as you can't be certain aliens don't exist, you really can't know for sure if they do !! Although I can't say they exist ... i don't really see it impossible ... they "might" exist ;)
1014608
Probably,\n\nI don't know if they are walking talking aliens, but I wouldn't be surprised to find out there are other forms of life that didn't start in our solar system.\n\nAfter all, there are billions and billions of solar systems. Are we so self-absorbed /self-involved that we think this could only happen to us.
248125
I don't believe that there is any tangible proof that there are aliens, but I have always believed that there are. Just considering the amazing size of the universe, it seems unlikely to presume that there isn't other life out there somewhere, perhaps even "intelligent" life.
513036
There are some credible high ranking government officials who claim they have worked with aliens and/or alien technologies. Links below...
806535
I believe in Aliens landing. I am not so naive to think that we are the only living things in the universe. I thinks aliens do exist and they are much smarter than we. \n\nThank you for the article. It is pretty cool!!
162806
U.F.O. is "unidentified flying object", so yes, there are. \nThe best evidence that there is more advanced technology than the general scientific consensus is able to agree upon is here: http://www.ufoevidence.org/topics/belgium.htm\n\nAre they alien? Depends if you believe that everything in your science textbook is gospel. If you do, they are. If you don't, they are probably government-owned and operated, along with a huge propaganda machine to keep anyone from finding out if there are or are not aliens involved. Either way, they know how to pick up our fighter aircraft's radar signals, so they probably have some link to our 'backward' technology in order to do so. Would aliens automatically worry about our missile control systems? Maybe. Would an advanced earth-based crew want to be backward-compatible with their own threats? Absolutely.
122399
Spontaneous combustion is real although it's causes are not understood.  I wouldn't spend too much time / effort worrying about suddenly bursting into flames though, it is extremely rare.  Aliens might exist although undeniable proof of their existence has eluded us up to this point.  It is likely that somewhere on one of the hundreds of billions of planets in our universe life could be and is supported.  I'm guessing we will never encounter them during our lifetimes, and probably not for thousands of years to come, but if we keep looking who knows what we will find, or what might find us.
772054
No.  Alien visits are generally explained more reasonably by more down-to-earth scientific reasons.  Sightings of "UFO's" are most often military aircraft, ball lightning, or occasionally meteorites falling through the atmosphere.\n\n"Alien abduction" survivors tell fanciful stories, but those experiences are more likely to be from vivid dreams (no doubt influenced by other stories and pictures of 'alien life'), sleep disorders, or (rarely) delusions or outright frauds searching for attention.\n\nRemember - extraordinary claims require extraordinary evidence and proof.  That's just not there yet.
1088527
Statistically it is very likely there is. There are many many billions of galaxies with billions of planets.\nThere are also some organisms found on meteors, but that’s not sure those came from the outer space.
355911
There are many reports of humanoid aliens. The nordics you mention are just one of hundreds of different types reported. You might want to also consider researching Men in Black. The Jenny Randles book is exceptioning good on the subject. She is a serious UFO researcher.
746941
No.\n\nSo far we've seen no verifiable evidence of other sentient species. That said, I believe with some certainty that somewhere in our galaxy at some past, present, or future time, a sentient species did/does/will exist.\n\nWhy haven't we heard from them?\n\nPerhaps they are not technologically advanced enough to be heard. They may be mastering stone knives right now, or experiencing their own Rennaisance.\n\nPerhaps they are here right now. Any species sufficiently advanced to travel interstellar distances would be able to hide or masquerade with ease. That Boeing 737 that flew by may be a surveillance craft.\n\nPerhaps they are so far away they will never notice us and vice versa.\n\nPerhaps they existed a million years ago and died out.\n\nPerhaps they will exist a million years from now.\n\nIt is really impossible to know for sure.\n\nThe Drake Equation suggests that there is sentient life out there. The Fermi Paradox casts doubt. Play around with the calculation form at the second link and see what you think.
947592
i believe they exist, only because I believe that the universe doesn't end meaning that mathematically on some other planet, it maybe one out of the speed of light, but it is possible beacuse theere are millions apon billions of other galaxcies all with many other planets and chances of producing life\n\nhowever with that being said the closest galaxies have aready been examined and concluded impossible to produce life as the planets of the other systems are way too harsh to support life, let alone intellegent life, not too mention those galaxies are light years away, so any one who beleives in alein encounters are bogies.
820032
If you mean aliens that have visited Earth then NO.  Sci Fi bullsh*t that deserves no airtime at all.  If you mean the existence of life on any planet anywhere in the Universe then undoubtedly it does exist.
295065
No, I think if there were aliens out there, we would have some form of definitive proof by now.