There is nothing specific about our consciousness that makes it unique to earth.
"Mistaking the map for the territory is a logical fallacy that occurs when someone confuses the semantics of a term with what it represents. Polish-American scientist and philosopher Alfred Korzybski remarked that "the map is not the territory" and that "the word is not the thing", encapsulating his view that an abstraction derived from something, or a reaction to it, is not the thing itself. Korzybski held that many people do confuse maps with territories, that is, confuse conceptual models of reality with reality itself."
But how did anyone verify there is an underlying reality outside consciousness? It's just an assumption right?
It's the stuff which continues existing when we stop believing in it.