Wednesday, February 21, 2024

Who's the Alien Now


Way back when this weblog first started, and I had just begun to read religiously the scientific research press releases, I came across this paper; but then I lost it, and I've been looking for it ever since:

Researchers use Moore's Law to calculate that life began before Earth existed
Apr 2013, phys.org

By reverse engineering the rate of acceleration of genetic complexification, the zero-point of origin comes out at 9 billion years, five more than Earth’s existence. 

via the Gulf Specimen Marine Laboratory in Florida and the National Institute on Aging in Baltimore:  Life Before Earth, arXiv:1304.3381 [physics.gen-ph] arxiv.org/abs/1304.3381


Since it has been many years since I first came across this article, perhaps some re-recognition is in order.

I now understand that extreme claims require extreme evidence. Sure, I knew the Carl Sagan quote back then too, but only now, after many years of being burned over and over again do I think I understand it. The idea of using Moore's Law to compute the age of all living organisms sounds pretty extreme, and pretty amazing, so let's get critical.  

First of all, Florida (Gulf Specimen Marine Laboratory in Florida, to be specific). I'm sorry for everyone who lives and works there, but simply incuding the word Florida in any (any) piece of information I see automatically lowers the credibility quotient.

Next, I look at a couple other papers by the authors:

Embodied cognitive morphogenesis as a route to intelligent systems. Bradly Alicea, Richard Gordon, Jesse Parent. Interface Focus Royal Society 06 June 2023, V13 I3. DOI:10.1098/rsfs.2022.0067

Along with the word "Florida", there are other identifiers of low-credibility content I like to use. One of them is "morphic resonance" and "morphogeneis", terms refering to the evolutionary biological theories of Rupert Sheldrake, which are generally considered to be...low on the credibility scale. 

Comprehending the Semiosis of Evolution, Alexei Sharov, Timo Maran, Morten Tønnessen. Biosemiotics. 2016 Apr; 9(1): 1–6. doi: 10.1007/s12304-016-9262-7

And, not that I have anything personally against "semiotics" (big fan actually), it's when you combine semiotics with evolutionary biology that your mouth gets a warning label in my brain. Not that you're wrong, just that it's going to take a lot more to convince me. 

So let's not get too excited. The idea itself though, it's pretty nuts.

Background: The size of non-redundant functional genome can be an indicator of biological complexity of living organisms. Several positive feedback mechanisms including gene cooperation and duplication with subsequent specialization may result in the exponential growth of biological complexity in macro-evolution.

Results: I propose a hypothesis that biological complexity increased exponentially during evolution. Regression of the logarithm of functional non-redundant genome size versus time of origin in major groups of organisms showed a 7.8-fold increase per 1 billion years, and hence the increase of complexity can be viewed as a clock of macro-evolution. A strong version of the exponential hypothesis is that the rate of complexity increase in early (pre-prokaryotic) evolution of life was at most the same (or even slower) than observed in the evolution of prokaryotes and eukaryotes.

Conclusion: The increase of functional non-redundant genome size in macro-evolution was consistent with the exponential hypothesis. If the strong exponential hypothesis is true, then the origin of life should be dated 10 billion years ago. Thus, the possibility of panspermia as a source of life on earth should be discussed on equal basis with alternative hypotheses of de-novo life origin. Panspermia may be proven if bacteria similar to terrestrial ones are found on other planets or satellites in the solar system.

Note: Genome increase as a clock for the origin and evolution of life. Alexei A Sharov. Biol Direct. 2006 Jun 12;1:17. doi: 10.1186/1745-6150-1-17.


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