In the billions of galaxies, there bound to be other life forms. The idea that we are alone in the universe is like saying the earth is flat. Though some things cannot be proven until the technology enables us to, it is just plain common sense.
I really hope it does turn out to be aliens. It'd be amazing. It'd certainly make up for the "actually wait, no, neutrinos can't travel faster than light, sorry" and "the thing we found on Mars that everyone thought was going to be life was actually nothing" situations we've had recently. But it's something so extraordinary that my spidey-senses can't help but go off. I mean, it'd be the discovery of the century. SETI would certainly see some more funding. I just can't help but feel very, very sceptical about it.
@Zereo: What makes you think us humans are doomed when extraterrestrial life hits our planet? Who's to say they'd be more technologically advanced than us? Who's to say they will be hostile towards us? And who's to say they are not here to discover other planets just like us humans?
Just my way of thinking, if extraterrestrial life comes to our planet while we don't even have the technology to send humans to other planets then they would be far more advanced then us. And from looking at history usually when a new place is discovered by a more advanced civilization it doesn't end good for the indigenous people. Like the american Indians for example.
Just my opinion and your right they could come for other reasons.
If they manage to reach us, then they must be waaaaaaay more technologically advanced than us. Aside from unmanned craft, we've never got further than our own moon. Also, the universe existed for over 13 billion years before humanity came into being (we've existed for a paltry 200,000 years for comparison) so it's logical that there are civilisations out there that have existed for millions, if not billions, of years (if that is actually possible), too, and unless they progress very slowly - I think it was Carl Sagan who pointed out that a thousand years to us could be mere seconds to an alien whose brain works more slowly than ours, and vice versa - they would necessarily be far more technologically advanced than we are. Although the optimist in me hopes that aliens would be peaceful and that they'd share their technology with us, part of me agrees with the belief that they would see us in much the same way we see ants. I don't think they'd bother killing us though. It'd be like that scene in Watchmen at the end where Dr. Manhattan says "The world's smartest man poses no more threat to me than does its smartest termite". I hope that wouldn't be the case, but being ignored would beat being annihilated. Assimilation into a vast, intergalactic empire would be cool too, as long as it wasn't a suicidal one like the Covenant. Whatever happens, Earth will always have more excellent water slides than any other planet we communicate with.
It was a joke, a play on the title of the Ancient Aliens show on the History Channel. Also what Cheraphy said. Fossilised aliens => ancient aliens.