Do you think we will discover life somewhere other than earth in my lifetime?

[Arturo]

....
It looks like we're discussing a 'organism' that arrives by some kind of abiogenesis and then remains unchanging in perpetuity? Would that be what you're describing?

Correct.

How complex does this 'organism' have to be.

Leave it up to imagination I guess.

[Tank]

....
It looks like we're discussing a 'organism' that arrives by some kind of abiogenesis and then remains unchanging in perpetuity? Would that be what you're describing?

Correct.

How complex does this 'organism' have to be.

Leave it up to imagination I guess.

In that case I would have to say that for an organism to reach a state of evolutionary equilibrium would be vary rare. They do exist though. The horsetail, Ceolocanth and immortal jellyfish get pretty close.
   

[Arturo]

....
It looks like we're discussing a 'organism' that arrives by some kind of abiogenesis and then remains unchanging in perpetuity? Would that be what you're describing?

Correct.

How complex does this 'organism' have to be.

Leave it up to imagination I guess.

In that case I would have to say that for an organism to reach a state of evolutionary equilibrium would be vary rare. They do exist though. The horsetail, Ceolocanth and immortal jellyfish get pretty close.