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A comment on NASA study finds life-sparking energy source and molecule at Enceladus. Parent comment

Re:NASA study finds life-sparking energy source and molecule... by spenczar5 on Saturday December 16, 2023 @03:40PM (#38667470)
Our upper limit is something like 10^-1. After all, there is life on earth! Our lower limit is 10^-25 or so.

Why pick the lower limit? Existence of life on earth is extremely powerful evidence.

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Re:NASA study finds life-sparking energy source and molecule... by superposeur on Saturday December 16, 2023 @04:14PM (#38667730)
Ah, but in my opinion we can't call 10^-25 a lower limit since, if life didn't occur in this collection of planets, we wouldn't be here asking the question in the first place!
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