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A comment on Why extraterrestrial life may not seem alien. Parent comment

Re:Why extraterrestrial life may not seem alien by wizzwizz4 on Monday August 02, 2021 @12:14PM (#28038587)
> because nothing can eat them

But I assume they're not immune-invulnerable.

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Re:Why extraterrestrial life may not seem alien by echelon on Monday August 02, 2021 @12:15PM (#28038609)
Where did the reverse viruses that can bind to their cellular receptors and co-opt their reverse cellular metabolism evolve?

To be clear, evolution of viruses is probably inevitable. But on what time scale does it take for them to arrive ex nihilo? Millennia? Longer?

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