GarryB wrote:We have no idea what their dietary needs are... for all we know they might have taken parts we don't even understand in our primative level... we are still learning new things about the human body for goodness sake…

There is insufficient information to be sure about anything... your comment is illogical....
More like you hope... as do I.
I'm basing it on the phenomenon, all aspects of which are ultimately comprehensible i.e. rational.
They likely observed us long enough to know we are fucking mental and are probably now monitoring our progress and hoping we kill ourselves before we start really expanding into space and killing others.
If they really thought there was no hope for us and they'd be better off with us dead we'd probably be dead already.
... but if it could have developed somewhere else and arrived here could it not also have developed here too... it just sounds unnecessary... are they saying life could have developed on a comet or asteroid in space or on a planet that the life survived the destruction of and then landed on earth to restart development from acids and chemicals into actual life with a water rich environment…
Good points. I never believed in "panspermia."