Initially I did a spit take because it just seems so silly, just preposterous. But on second thought Seth Abramson is not a jokester he's a pretty serious researcher so let's wait and see but could this be the beginning of alien apocalypse dystopia blah blah blah.....??
imo aliens are likely to breathe oxygen themselves, if they haven't messed with their own biology too much. it's just way better than basically any other substance for powering metabolism in an organism, especially a big organism that thinks and moves around.
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