posted on May, 20 2014 @ 09:20 AM
originally posted by: qmantoo
This comment really shows how much you are open to other possibilities.
Our biology is based on the carbon atom, yes? Well, what if theirs is not based on that atom but another, say silica for example?
Silicon based life may be possible, but the chemical properties of carbon is what makes it ideal for metabolic processes.
Carbon has the ability to bond (and unbond) relatively easily to itself, easily creating complex chains of molecules used in metabolic processes --
i.e., the carbon atoms of simple hydrocarbon molecules link with the carbon atoms of other simple hydrocarbon molecules, creating long chains of more
complex organic molecules. Silicon based life is sometimes mentioned by astrobiologists because Silicon has a similar ability to bond with itself,
BUT it still does not bond as easily to create long chains of varied and complex molecules like carbon can...
...When silicon bonds to itself, it does so in more of a crystalline structure rather than in long chains like carbon can. It is these long chains of
carbon/hydrocarbon/organic molecules that drive metabolic processes rather than crystal structures.
Can there be silicon life? Maybe. However, it seems carbon is much more likely to be able to spontaneously become part of a metabolic process, and
carbon seems to be ubiquitous in the universe. Therefore it seems more likely that life will use carbon, mostly because it seems to be the easiest --
and nature likes easy.
edit on 5/20/2014 by Soylent Green Is People because: (no reason given)