Need a good analogy of finding life in the universe

[Naty1]

Lower life forms would appear to be unable to spread beyond a single star.

not necessarily so. If amino acids can make it, what else??

I watched a tv program last night "Aliens'...a series with different topics...not all that interesting overall but they made some interesting comments:

DNA is now believed well suited to interstellar travel,
an advanced civilization might well go robotic themselves but with species 'intelligence',
Might be an advanced civilization would be more interested in our resources than humans,
If predators more intelligent than prey, might alien travelers be so determined?

 

[2milehi]

...To continue the analogy further, do we see anything lying around that we are incapable of fathoming? Do we see any mysterious structures that we have no idea what they are? The answer is no, everything that we see is quite explainable...

Dark matter, dark energy, graviton, Unifying theory...