"including the possibility of silicon-based life forms"
Really? You want to go there? You might want to research that a bit. You'd be hard pressed to find a biologist that believes silicon based life forms is even a remote possibility ANYWHERE in the universe. Silicon is abundant, but silicon based molecules similar to organic carbon based molecules are nowhere near as abundant and, more importantly, diverse. Consider the fact that on Earth, silicon is more abundant than carbon by over 900:1 and yet life is carbon based. There's is nothing even remotely compelling about the idea of silicon based life.