Couldn't sentient extraterrestrials live on planets we imagine as inhospitable?
Why is it presumed that most sentient extraterrestrial life will come from an oxygen laden planets and that they will breath air, as we do? It could be plausible that they could have an atmosphere of nitrogen, radon, helium, etc. The thought that extraterrestrials out there can live apart from what we call water and air is that big of a stretch to imagine?
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