Why don't extra-terrestrial entities make themselves known to the human species?
474682
They, like us, are probably unaware of the existence of beings on other planets. The universe is infinitely large, so if there is life elsewhere(there probably is), then the distance is likely too great to travel in a lifetime.
429749
With the nearly infinite number of stars out there, it is reasonable to expect that life has developed on another planet. However, we won't know for sure until we actually encounter that lifeform, and that may be a long way off.
840197
No aliens, no UFO, unless you consider top secret aircraft *designed* by human beings of this planet -- which are flown only at night so they will not be identified -- as UFO.\n\nIf aliens from outer space had come to Earth, they would have had the technology to not be captured in the first place; and they could have gathered all the info they would have needed from orbit anyway.\n\nArea 51 is secret because there are captured airplane from other countries in there; and the US government does not want anyone -- especial the foreign governments -- to know what they know about them.\n\nBut flying saucers?  No way.
341926
There are theoretically countless planets, because there are countless stars, and a countless number of those will have a planet the same distance as ours. So there has to be countless other life forms out there.. the problem is, is that space is so bloody huge that the distance and time it takes to get anywhere far outways the task of actually doing it ( for other advanced lifeforms ).. And the chances that anything would choose to come our way is pretty bloody remote. But don't let religions lead you into believing we are the only lifeforms, that would be naive
1151803
Yes indeed.  As part of our evolutionary 'toolkit' of survival strategies, we have a highly developed faculty for detecting other entities in our environment - We often notice human faces in carpet patterns, rabbit-shaped clouds and so on.  There is more survival value in seeing what really *is* there, and also seeing some things that *aren't* really there, than in missing things that really are there and going hungry, or worse, ending up as someone else's lunch.\n\nThe consequence of this undeniably true aspect of human nature is that we have a natural tendency to imagine entities behind natural phenomena and events in our own lives that aren't really there - i.e. gods and goddesses, demons, angels, spirits - a whole menagerie of supernatural characters.  Society and culture binds up these characters with our wishes and fears, our desires for dominance and submission and shared identity, and we end up with religious belief and ritual and dogma, in thousands of different flavours, with the vast majority of people broadly following the religion of their upbringing.\n\nReligion is a biological phenomenon, not a supernatural one.
18185
since UFO simply means Unidentified Flying Object, anything you see zipping about in the sky that you can't identidy is a UFO... so yeah, you sorta have to believe in them.  ;)  \n\nas for creatures from another planet finding us, the possibilities of that are slim, due to the vastness of the universe.  travel at or above the speed of light is impossible, as that's when you get complete molecular and atomic disintigration.  the only way life can travel distances is if energic beings exist, or if it's in some primitive seed state, dormant inside some meteor, but that's not all that likely, especially since when simple protein molecules impact at those high speeds known to meteors, they change..  forming amino acids.  this is cool, as such can help form the building blocks of life, but i cannot imagine that such would actually spawn life, but hey, life is a product of environment, so if a species evolved to spread as such, then so be it.\n\nback to sentient beings finding us, let's say they mastered interstellar travel..  at speeds that don't cause their matter to break up, they could travel, but their ships would have to be of some sort of colony-type, so that the decendents of those who set out would be the ones that eventually "got there"...  and then our planet would be little more than a pile of resources they'd just end up taking, than some opportunity for some cool star-trekkish interstellar alliance.  ;)
241844
There are many reasons we want to know about other worlds.  One large reason is the possibility of extraterrestrial life.  Is there life outside of Earth?  Is it intelligent?  What benefits can we derive from contact with alien life forms?  What dangers could it pose to our way of living?  Increasing our knowledge about other worlds is probably the best method currently available for answering these important questions.\n\nFurthermore, there are pragmatic issues at stake.  The Earth cannot sustain life forever.  Eventually, human beings must populate other planets if the species is to survive.  (Examples of possible global cataclysms rendering the Earth unihabitable abound--at least a dozen blockbuster movies in the last decade have been based on some type of apocalyptic circumstance.  And though the premises remain remote, on an infinite timeline all possible events approach certainty, i.e. the habitability of the earth will eventually end).  If we are to survive, we must prepare to inhabit other worlds, and in order to do so we must learn about them.\n\nAside from the survival of humanity, another practical reason for seeking information about other planets exists:  the increasing competition for natural resources.  The nature of the system tends toward a more and more efficient consumption of resources.  Since the quantity of terrestrial resources is finite it stands to reason that very soon we will need to seek external resources to sustain systemic growth.  (This is why one of the major functions of the current probe missions is to determine the chemical composition of extraterrestrial bodies--we're looking for stuff we can use).\n\nIn the end, though, the best answer to this question is probably much more simple:  people are curious.
541174
Space is vast, and we would be very arrogant to think that we are the only humanoid race in it. In fact space is so vast that we may never meet another either. Yet even with no proof, it would be very closed minded to beleave there isn't.
772654
Hi Muslimah, I think that if aliens did exist they might have either little knowledge of God in which case they would be in no position to make such a judgment.\non the other hand they may have a greater understanding of God and in this case, would be amazed at human beings constantly at each others throats, about the God of love and compassion that they say they know and believe in ,and would find this quite puzzling.
320823
I've seen an alien, they're in the form of light. and aren't reflective. They dont have bodies, and they communicate at radiowaves so high we cannot hear. they dont have faces.
724199
So 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 just 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.
552930
Definitely in the case of simple life forms, if only from a simple mathematical perspective. Intelligent life seems a bit more chancy, but it seems still probable. Whether or not we would ever contact that life seems a very distant possibility indeed because of the obstacles involved. First is technical: the difficulty in detecting the other civilization because of the differences in level and types of technology (for example, a civilization here on Earth which uses only radio waves to communicate would be oblivious to microwave cell phone messages). Then the tremendous distances over which a message or spacecraft would have to travel must be addressed. Even after surpassing these technical issues are the motivational factors in that there is a good possibility that the nearby civilizations would have no interest in contacting us either because they are too advanced or just lack the motivation for interestellar discourse. It would be unrealistically arrogant of us to assume that all life forms would share the same interest in studying  sociological interactions in simpler organisms.
920829
I think likely it will be a physical encounter ;\nThe reason is if you consider how far we have come in the last 50 years think of how far a species could have advanced in a million years after acquiring space travel capabilities.\nThere aree several reason another space faring species likely ar either aware of us or close to being so.\nIt stands to reason there would be billions of species which would not have had the turmoil our ancestors had on earth, thus enabling them to advance further.\nThere would have to be millions of species which never adapted the religious fevers our ancestors did and thus they did not have their entire civilizations in bondage to myths.\nThere has to be millions of species on millions of planets who would not think like humans but act instead more like insects (ants, bees, ect)  in which the entire species would act in sequences together and not splintered as earthlins are.  This would increase their chances of space travel even lignt speed and beyond by 1,000,000 %.\nIn planetary societies where the entire species worked together to futher space travel and colonlization we  would be very inferor were they to meet us.\nThe universe is so large in itself that the time when will humans meeting another species is going to happen because there has to be already so many space faring species out there..  It's not if.  It's when. And they may very well be watching us now for possibilities.  \nA species bent only on survival in mind and colonization would hardly consider us worth negotating wiith for peace.  The may well not under stand anything byut their own survival and expansion.
271055
We lack the proof, only the high probability that something exists in one of the trillion or so systems out there.  Have you noticed that with all the camcorders out there in the past 5-10 years that there's been a lack of UFO sightings...just my observation.
216857
yes....just because it's unidentified doesn't make it extraterrestrial.
288541
Yes! We would be arrogant if we thought we are the unique beings on the whole galaxy!\nHowever, I don't believe anyone has ever seen a UFO. It's just in our imagination.
1002528
Sightings have been seen throughout the world.  The less developed countries are not heard from because they may not have the communication technology, government censorship, and some people see them so much that it is a natural occurrence and not something to report.  Aliens are here to assist all Humans to evolve.