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Radical Study Suggests Life on Earth Arose Twice

sciencealert.com

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Re: Radical Study Suggests Life on Earth Arose Twice

#3

Post by lanstin »

pingou wrote: post #2

If true, fl in the Drake equation just got much bigger.

They aren’t saying two totally different independent life creating event, they are saying that the earliest life depending on some external chemicals for parts of what is now covered by metabolism, and the tree of life diverged before those metabolic paths evolved inside the organism, so not totally the same emergence of life twice, but more stuff that reproduces and evolves but doesn’t meet modern standard for life.

Re: Radical Study Suggests Life on Earth Arose Twice

#6

Post by ch4s3 »

lanstin wrote: post #3
pingou wrote: post #2

If true, fl in the Drake equation just got much bigger.

They aren’t saying two totally different independent life creating event, they are saying that the earliest life depending on some external chemicals for parts of what is now covered by metabolism, and the tree of life diverged before those metabolic paths evolved inside the organism, so not totally the same emergence of life twice, but more stuff that reproduces and evolves but doesn’t meet modern standard for life.

The science alert article should make this more clear, as its easy to get that impression.

Re: Radical Study Suggests Life on Earth Arose Twice

#7

Post by lanstin »

lanstin wrote: post #3
pingou wrote: post #2

If true, fl in the Drake equation just got much bigger.

They aren’t saying two totally different independent life creating event, they are saying that the earliest life depending on some external chemicals for parts of what is now covered by metabolism, and the tree of life diverged before those metabolic paths evolved inside the organism, so not totally the same emergence of life twice, but more stuff that reproduces and evolves but doesn’t meet modern standard for life.

Honestly just more “biology has enormous areas without enough data that need filling in” causing previous generalizations (e.g. the central dogma of information flow being replaced by protein regulation of gene expression, non-coding DNA, even neurons and egg cells being produced thru life) to be overthrown, more than anything, IMO.
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