George to BBella: "[i]I just go by the evidence. If you can come up with evidence of such beings I'm prepared to accept your hypothesis. Otherwise it is no better than fiction.[/i]" - dhw: "[i]Fair comment. However, here is a dictionary definition of abiogenesis."The hypothesis that life can come into being from non-living materials." There is no evidence for this hypothesis. Ergo, no better than fiction?[/i]" - On the contrary. Life on Earth is known to have existed for some four billion years. Before that there is no known life, only non-living material (though that would include 'organic' molecules, e.g. involving long chains of carbon atoms). This is evidence that life DID come from non-living materials. If not what else could it have come from? We know that all existing life forms depend on carbon-chain chemistry.