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Jupiter's moon Europa, one of the most likely homes for extraterrestrial life in our Solar System, was named earlier this month as a priority for exploration by the US National Research Council. But NASA's working definition of life, "a self-sustained chemical system capable of undergoing Darwinian evolution", is far from ideal. It risks excluding some novel life forms that could exist, such as ones that replicate so haphazardly that natural selection is not an option. And there's a practical problem - just how long are you going to hang around on Europa to see whether potential life forms are evolving?
Instead, the search will have to rely on a list of expected characteristics, such as the presence of complex organic molecules, or entities with a morphology that can't be explained by chemistry alone.
Originally posted by Protector
If it can move on its own, it's alive.
Originally posted by 2009
there is no answer for our current understanding of knowledge and wisdom.
Originally posted by nojoy
What will our conscious minds accept? The scientists say there are parrallel universes and other deminsions right next to us right now. But "our" consicous minds won't "let" us see them or experience them. What if one of these "Alien" life forms stood before you, could your concisous mind accept that form without some point of reference, or would you just die on the spot from fear? What I am trying to say is that this is a fulid thing. What we know today is changed be what we learn tomorrow. LET THE DEFINATION BREATHE!!!
[Edited on 30-4-2004 by nojoy]