Encounters with UFOs are the favorite subjects of both scientific community and commoners. And this continues until a solid and convincing proof of the aliens come out.

Universe is unlimited, and there may be life evolved on other planets like on earth. People on earth are trying to go on other planets, same would be happening with aliens living on other planets. So it may be possible that aliens exist.

Koi Mil gaya also a nice movie regarding stuffed emotions of aliens, this is the continuance mystery of humans are we alone here in this universe?

Movies are make believe yarn spun by the writers. They are meant to draw the crowds. About aliens and UFOs nothing has been proved.

The universe is infinite and we have knowledge of maybe just 5% of it and no more. There is every possibility that a similar solar system such as ours exists somewhere hundreds of thousands of light years away, containing life similar to us or may be more advanced. The mere fact that they are keeping away from us and have not attempted to contact us directly yet is the sign that they are intelligent!

Humans have the tendency of dismissing anything that fails to produce scientific evidence. It's mere foolishness to deny the existence of a thing because of lack of evidence. Why don't we think that the present knowledge of humans is inadequate to unravel the mysteries of the universe which are infinite in number?

But we still to find the finite element of infinity and we still not able to measure dimensions beyond three and possibly we missed something. 

May be possible in near or distant future. Till then these speculations will be making rounds.

mohan manohar wrote:

But we still to find the finite element of infinity and we still not able to measure dimensions beyond three and possibly we missed something. 

I don't think so...it is quite vain of us think  that we can figure out everything there is to see! We have to accept that some things are infinite and beyond our grasp or understanding!

True Kalyani.  Not something's, but it's infinite. As you said in an earlier thread what we know about universe and it's mysteries are very very less. We need not wonder if these mysteries remain mysteries forever.