| Humans would not be identically conscious on a different planet because our consciousness is dependent on the environment in which it exists. Even a cursory definition of consciousness must include the sum total of all of our sensory perception, and without the biome to augment that perception, it is impossible that our consciousness would not shift to accommodate the inclusion and exclusion of whatever difference in our sensory input would give to our experience of being alive. We would all _be_ conscious (presuming relative health), but if we were all on Pluto, for example, the lack of light would change our consciousness, and for each individual this change would happen at a rate determined by their experience. Perhaps this change would happen gradually enough for some that it might be considered an artifact of evolving, but certainly the change would begin the instant we left Earth's influence, and what might be considered our 'normal' state. I realize it's a little (though I detest this term) 'hand wavy' because it's a thought experiment based on zero examples, but we do know that our consciousness is dependent on what we perceive and don't perceive. Hence the question posed by Nagel [1] "what is it like to be a bat?", as bats are cognitively very close to humans (relative to the entire biome), but without eyesight, it is fairly clear that the consciousness of a bat would be different than that of a human. I recognize that this point is not necessarily the one central to your comment, but I do think it's interesting to remember that if we were not here, we would not be as we are. [1]https://en.wikipedia.org/wiki/What_Is_it_Like_to_Be_a_Bat%3F |