Quote:
Originally Posted by snas
Craig, this is an excellent question. It has been suggested that we are living in a narrow zone called the habitable zone. And yet it has also been suggested that some of the moons of Jupiter and Saturn may be candidates to harbour life. We may live in a narrow habitable zone for the life forms we see on Earth, but microscopic life may (or may not) exist far out in the solar system where we could clearly not survive.
So it may be that in our own solar system or in another star's system that there are more than one habitable zones, one for us, and one or more closer in to the star, or further out than we (or similar life forms?) are.
Stuart
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So Stuart;
We really have no non-Earthly-based ideas about where to confine our searches for exo-life ?
And yet there is a need to discuss the probabilities for finding it.
This whole 'there must be exo-life argument' is just as silly as the 'there must be
no exo-life' argument.
There is no scientific data other than that based on our own instance of life on Earth (which is all inter-related). Extremophiles, in my view demonstrate only that life which finds its way into 'extreme' environments can adapt to that environment. This does not mean that it can
emerge from that environment.
Cheers