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I think that there certainly is, was or will be - but the problem is the:

http://en.wikipedia.org/wiki/Fermi_paradox

I, personally, believe that the fundamental problem is that only predators develop significant intelligence, because they really NEED it. This may be fundamental to life itself, regardless of it’s form, DNA, chemical basis, and so on. You can see evidence of this on our own planet - why have all the great civilizations developed between 30 and 50 degrees of the equator? Because those people faced more adversity. Neanderthals were likely to have been more physically capable than we are. Where are they now?

For predators such as ourselves, many have estimated that the time between developing radio to blowing the he** out of your planet may be as short as 100-500 years, which is, of course, the blink of any eye in cosmological terms.

An inkling of this theory can be found in the Bible itself, in the Adam and Eve story...”biting the apple” has it’s costs...

Right on. I am convinced that life will evolve on water based planets. We are lucky here being on a spiral Nebula away from much of the galaxy turmoil.

What about liquid methane, or ?

Life evolves eating other life, so what happened to the dinosaur predators? Not enough time?

Neanderthals were likely to have been more physically capable than we are. Where are they now?

Modern humans (Cro Magnons) killed them all. This is what a Neanderthal actually looked like:

( www.themandus.org )