We simply can't answer this question, maybe only for now. The universe that we know of is monstrous, I mean, beyond understanding. Not only size-wise, but also, maybe we have about as much knowledge of how "reality" works now, mostly based on Standard Model and stuff, as we have explored actual universe. What if we know pretty much nothing?
And what we don't know, is left for speculation. In fact, we don't even know how much we don't know.
And what we don't know, is left for speculation. In fact, we don't even know how much we don't know.
So are we alone in the universe?
Well, I or anyone else on this planet have no evidence that there is life somewhere outside Earth. But then again, anyone who would firmly say that we are definitely alone is simply stupid. We don't know. And we might not be able to answer this question anytime soon, so relax, fellows.
We don't have to have an answer to every question, there is no shame in not knowing something. It drives us further 
Maybe They are already here, but we simply have no capabilities of even imagining them?
Imagine - there is a worm on the ground, just wobblin around and it has its own world and "understands" its reality one way. Its understanding is probably very basic compared to ours. So what do you think this worm "thinks" about us?
It is incapable of perceiving the universe the same way we do and therefore we don't exist to it. Worm is unaware of humans.
Imagine - there is a worm on the ground, just wobblin around and it has its own world and "understands" its reality one way. Its understanding is probably very basic compared to ours. So what do you think this worm "thinks" about us?
It is incapable of perceiving the universe the same way we do and therefore we don't exist to it. Worm is unaware of humans.
Now what if we are just "worms" to something?
I am fascinated and scared about topics like this. And this combination introduces curiosity 
