[Split Thread] Extraterrestrial origin for life on earth?

How do we know the seeds of life on earth didn't start from a massive asteroid hit? Thus, all flora and fauna on earth have evolved over millions and millions of years x millions millardia to be as they are or have become? Thus, on another planet we might not need water and oxygen, we might evolve to survive on Martian elements instead. IOW our bodies have adapted to earth so in theory we could adapt to other realms similarly.

Split from this thread, as it's discussing a different topic.

Posted By:zooterkin

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