(Original post by WaceMindu)
| think someone did the maths and likelyhood of alien life once, taking into planets the correct distance from the sun and likelyhood of water being present and even a standard of error taken into account and the likelyhood of there being other life is still freaking huge.
we're also only factoring in our species specific boundaries for life. There is in all likelihood going to be forms of intelligent life that exist outside of our own corporial and physical boundaries. For example think of the heat spectrum. We exist in a very narrow segment of it before our carbon based protiens begin to denature and life is impossible.
there is a whole spectrum between -273K and upwards where other forms of non carbon based life could be possible that we might never even look for.
I would say it is incredibly likely that there is other intelligent life out there. What I don't think is likely is that we can or ever will reach it.
That's ridiculously futile: we have insufficient knowledge to usefully map the relevant variables, and thereby likelihood, of alien life.
The Fermi Paradox (which isn't a paradox), that given the existence of intelligent life, and the passage of cosmically minuscule time-constraints (which has been satisfied thousands of time over up to this point), many would be able to, and would proceed with, interstellar travel, colonisation and resource mining. It thus seems puzzling that, given high probability estimates of alien life, that we haven't detected any, despite efforts otherwise.
The most likely cause is an extremely low-probability barrier to something of the cognitive capacity of humans; tracing the development of life on earth, we can hazard guesses as to likely candidates (i.e. those crucial developments which took millions or billions of years to satisfy, and thus are leading candidates for exclusivity to earth). I think the evolution of multi-cellular organisms is perhaps the chief suspect.
(Original post by Friendly Liberal)
But we do not know the actual size of our universe. What is beyond the observable Universe? If the Universe is infinite then there are infinite me's and you's out there, and infinite me's and you's typing these exact words at exactly the same time!
I've seen this repeatedly rehashed, but it can be very easily accommodated by the Fermi Paradox: of course if the universe is infinite there is necessarily alien life, it simply reduces the 'paradox' down to the relevant scope of the universe under possible interaction (i.e. given repeated estimates of high-probability of alien life within the sphere of the universe under possible interaction, and the above-stated assumptions about low time-scales to interstellar travel, why haven't we encountered alien life).
(Original post by ryan9900)
Sounds like a question that a 5 year old child would ask. If you're asking if there is life out there, then yes, almost certainly.
Are there aliens with big googly eyes living on a space ship? No.
(Original post by ryan9900)
Very interested in space, with aspirations of being an astronaut.
The chances of life existing somewhere in the universe is very, very high. It just hasn't been found yet. I could go into a whole load of detail about it but it would be above most people unfortunately, especially OP. As I said, the question was very vague, and sounded child-like.
This is embarrassingly condescending: 'stop asking children's question, and oh yeah, I
explain, but it's too complicated for everyone but me'.