In my humble opinion, I do believe that life exists elsewhere in our universe. It's too big for it to of only happened once in my opinion.
Now intelligent life, again, the universe is a big place, and again I think it quite possible.
However, if you think about it, our existence on this planet reads like we are the luckiest lifeforms in the universe, if you consider all the events
that are thought to have happened in order for us to be here.
I could go back to the Big Bang, and the fact that certain physical laws were set at that moment, of which even the tiniest deviation of could have
brought forth a universe sterile of life (or stars and planets for that mater). However, let's just start with our solar system:
Our sun and earth formed about 4.5 billion years ago. During this time, the inner solar system is thought to have as much as 20 rocky planets orbiting
The theory is that many ended up in the sun, flung out from the sun, or collided with other objects.
One of those objects was the Earth, and this impact formed our moon.
Now here is the kicker:
That impact was with a Mars sized planet.....and it had to come in at just the right angle
to give us the correct impact that resulted in not
destroying our world, but instead resulted in a a moon forming, and very close to the Earth (but not too close to the Earth as the
would have resulted in no moon forming.
The impact made the Earth spin a lot faster than it does now. However, over time, the gravitational friction from the moon slowed the Earth down
enough to result in the 24 hour day we have now.
The other thing it did for us, according to theory, is help get life started on Earth, by the huge tidal waves cause by having the moon so close to
the Earth back then.
Let's jump forward to about 650 million years ago. The Earth's atmosphere would not support us humans, as the oxygen content was way too low. It was
at this time that the Earth went though it's Snow Ball Earth ice age, with the Earth totally frozen over for about 25 million years. During that
time, bacteria in the frozen oceans adapted and evolved, and it was a type that produced oxygen. A LOT of it.
Let's jump forward again to 250 million years ago. We had another mass ELE. The Siberian Steppes eruptions are thought to have caused this, that
paved the way for the dinos later on and the very first early mammals.
Jump forward again to 65 million years ago, and another ELE that helped get rid of the dinos, and allowed mammals to step up to the plate.
Now, think about human development. According to theory, at one point we are in the trees in what is now Africa. We came down out of the trees, and
the question of why is answered with the following theory:
The East African Rift. The plates opening up there caused a climatic change, which in turn changed the jungle canopy in that area to savanah instead,
forcing the primates out of the trees because they had to walk to another set of trees.
Think about all the things that have happened in the "modern human" era that eventually formed and shaped who we are today, with the technology that
we have to day.
Now I know I've skipped a lot of history here (hey, only so many words can go into one post), and I know there are debates about Evolution vs
Intelligent Design, but still think about it:
It's almost as though we had one lucky break after another right up to now.
Now, if that is how intelligent life is formed, woah. Talk about a LOT of things that MUST happen just right in order for it to do so.
But again, the universe is a big, big place, and so with the amount of stars with planets out there, I'm more than sure it may just of happened that
same way for some other intelligent race....the numbers of the entire universe support it.
As for UFO's and us being visited: I've not seen any conclusive proof to make me believe. I mean I have seen some UFO reports that I can't explain
either, but that doesn't make it proof.
But that doesn't mean that we were not visited a long time ago either, and they cataloged us as "Mostly Harmless" and went on their merry way
Oh, btw, on Evolution vs Intelligent design: I had a friend tell me this once:
Sure, I've read all the same science books as you, but I still think God created us. Who is to say that what we read in the science books isn't how
he did it?
I didn't have an answer for that one, as I couldn't prove him wrong on that!