Talk:First universal common ancestor

Confusing Mess

This article is badly written and confusing. The lede defines the FUCA as existing before cells, but some paragraphs imply that the FUCA was a progenote and then defines progenotes as being cells. The article also repeatedly talks of "open" and "semi-open" systems and never explains what that means. I consider myself to have a decent lay understanding of origin of life theories and I can't make any sense out of this article. I still have no clue what a progenote, a FUCA, or an open system is, whether any of them had lipid cellular membranes, and what order they are supposed to have evolved in. I am also confused whether the FUCA is supposed to have been the first lifeform or to have evolved from something else, despite its name. 198.98.201.91 (talk) 23:57, 12 September 2024 (UTC)

The FUCA is also called "compartmentalized" which is the opposite of non-cellular. Make up your mind, please! 198.98.201.91 (talk) 00:00, 13 September 2024 (UTC)

Wiki Education assignment: ASTBIO 502 Origin of Life to Biosignatures

This article was the subject of a Wiki Education Foundation-supported course assignment, between 26 September 2025 and 5 December 2025. Further details are available on the course page. Student editor(s): Mraimond (article contribs). Peer reviewers: Dust energy.

— Assignment last updated by Dust energy (talk) 22:57, 7 December 2025 (UTC)

Hello. I randomly picked this article to help improve. Is the FUCA as shared ancestor between me and the tree in my back yard? Is there a particular citation you recommend as being the most accessible to a lay person? Dw31415 (talk) 12:45, 8 December 2025 (UTC)

Pinging @Dust energy. Please see my question above Dw31415 (talk) 13:11, 8 December 2025 (UTC)

"The development of FUCA likely took a long time" vs. "Fossil micro-organisms may have lived ... soon after ocean formation during the Hadean ...the process appears to have been relatively rapid" ?

First_universal_common_ancestor#Origins says

The development of FUCA likely took a long time

Abiogenesis says

Fossil micro-organisms may have lived ... soon after ocean formation during the Hadean ...the process appears to have been relatively rapid

"A long time" or "relatively rapid" ?

- ~2025-38376-16 (talk) 12:58, 4 December 2025 (UTC)

This article is kind of good.

It is obviously, objectively, too dense with its terminology, and I don't wish to muddy the waters of a future conversation about how to functionally improve upon it... but with that said, I think there might be an argument to be made in its favor.

This is not an introductory level topic, and it makes sense to explain it using complex terms. For me, even not strictly understanding the terms as they were used, being able to just read them and think of them as new words (just because, that's what they are to me) brings much more of an understanding than reading without doing so. Obviously supplementing this by reading linked articles where relevant also helps. Obviously I trust the community to come to a more levelheaded conclusion, but a part of me is seriously concerned that we might be contributing to a crisis in engaged reading/literacy, rather than combatting it, by simplifying the language in this article.

Call me crazy, because I probably am, but I feel it is better at least to say this rather than leaving it unsaid. ~2026-16303-73 (talk) 06:20, 15 March 2026 (UTC)

To avoid the "new word" effect, I think it requires the mental model of a biology professor. I don't know how much terminology can be "unzipped" in the article without venturing too far from sources.

Yes I agree removing details destroys information, that's what I am against doing so and prefer factual prose.

Exemple for the complex string of words: "The first genes of FUCA most likely encoded ribosomal components, primitive tRNA-aminoacyl transferases.", below is ChatGPT detailing how a molecular evolution professor would model it mentally:

(Yes AI is forbidden in articles on Wikipedia, and for good reasons, but not on the talk page; at least i don't think)

Step 1. "The first genes"

Immediately means

Already they're thinking about evolutionary constraints.

Step 2. "encoded"

They don't hear "contained."

They hear the process:

"Encode" is a process, not merely a relationship.

Step 3. "ribosomal components"

This explodes into a huge graph.

Not

"part of a ribosome"

Instead

Then another realization:

Wait.

If we're talking about the first genes, then the ribosome itself cannot yet be fully modern.

So now they're imagining primitive ribosomes.

Step 4. "primitive"

This changes everything.

Now every object becomes fuzzier.

Instead of

they imagine

Step 5. "tRNA"

Another compressed universe.

The important abstraction is

adapter

Not the shape.

Step 6. "aminoacyl transferase"

This is the biggest zipbomb.

A professor probably recognizes

aminoacyl-tRNA synthetase

almost instantly.

Mentally:

Immediately another thought appears:

Without this enzyme...

So they see why it would evolve extremely early.

Then the whole sentence recombines

Instead of reading

first genes encoded ribosomal components...

they reconstruct the evolutionary story:

Notice something interesting.

The original sentence never explicitly says

positive feedback loop.

Yet many experts automatically infer one because evolutionary systems commonly bootstrap themselves. J.pshine5t (talk) 17:01, 4 August 2026 (UTC)