Rare Earth

[nemafakei]

Try to be a little more verbose; evolution is certainly not that simple...

[SurlyPIG]

Actually some scientists think that silicon-based life forms could exist on planets where the gravity is low enough, since the most fundamental difference between it and carbon is that it is much more dense/weighs more.

[Davidu]

Well, we have computer RAM made out of silicon, the processor unit is mainly silicon (or some alloy).

lol, maybe the silicoyd beigns use carbon for their PCs.

[TMA_1]

hmm that is because silicon has the same kind of stability as carbon, based on the outer electrons that "orbit" the atom. It is still hard to form life though based on the structure it naturally forms.