[coriny]

> This cast doubt on the long-established view that life was made possible when organisms started producing oxygen via photosynthesis, which requires sunlight, about 2.7 billion years ago.

So ... life began because it started producing oxygen via photosynthesis? I think they oopsed the word "multicellular" or "complex". A low-grade article and a long shot of a theory, but maybe not impossible.

[brabel]

Yeah... it seems to me that this kind of circular reasoning has become widely acceptable by people lately, they seem to lack some basic understanding of logic or something.

Sometimes, it works, like when there's a feedback loop and X causes Y which makes X stronger, causing more of Y... but in this case, they're saying "organisms (literally life) started producing oxygen, which originated life". I would agree with you they mean "originated complex life" but they repeat the claim later: "Deep-sea discovery calls into question the origins of life," the Scottish Association for Marine Science said...".

[PaulHoule]

It’s thought that the most common habitable environment in the universe is in underground oceans which are generic in outer solar system and probably interstellar bodies.

https://en.wikipedia.org/wiki/Planetary_oceanography

It’s easy to believe you could get bacteria in that kind of place with an ecosystem like

https://en.wikipedia.org/wiki/Hydrothermal_vent

but without energy input from sunlight it is hard to believe you could get more complex organisms or ecosystems, but if you had some oxygen from chemistry that might make a difference.

[dsign]

Some editors want to simplify everything a lot. I can heard the hypothetical editor in this case: "aerobic life" -> "what's aerobic? Too complicated Joe. I'm gonna red-pen it. Write just 'life'. See? Better, right? Now, Joe, does everybody know that organisms are clumps of church organs? Maybe you want to put a footnote somewhere?"