Quote:
Originally Posted by VydorScope
To be fair I would expect this to be true. Not because all nonterrestrial life eats/breaths/etc the same as we do, but because we would for the most part only interact with the subset that does. Logically we would not travel to a place like Jupiter to have tea with the natives. We might talk with them via some communications system, but in that case the eat/breath/etc stuff does not come in to play.
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Still, I find it questionable there isn't some toxins, bacteria(specially digestive), yeast(other fungus) or enzymes which would be bad for species which systems haven't had experience with them. Just think how regular bacteria from different area can cause diarrhea and there is same ancestors for them, something from different ecosystem could be much much worse and some species might not be able to adapt for such...