The underlying theme is that Mars was once an ocean-bearing, living planet like Earth. This is further explored with other scientists who speculate about a past civilization and the loss of Mars' biosphere. Geological features such as unusual craters, pyramid-shaped mountains and Valles Marineris provide most of that evidence. The peril of pareidolia is mentioned.The video has a lively, Sci-Fi vibe, with both solid evidence and intriguing questions.
Blue Planet Red, "...history, evidence for life, and catastrophes that contributed to the death of Mars," $6.99 on Vimeo, by Brian Cory Dobbs, 2023.
Life on Mars! has background.
"Tracing the evolutionary origins of antiviral immunity," by James B. Eaglesham and Philip J. Kranzusch, PLoS Biol., 06 Feb 2024. In this example, life evolves by using programming that is already available, as expected in cosmic ancestry.
As a schoolboy, Hoyle was already skeptical about the darwinian theory of evolution. Quick as lightning, he saw the connection between panspermia and the evolution of life. He saw that viruses could introduce new genes, that silent DNA might contain useful genetic programming, and that cosmic life could supply what random mutations can't. In the intervening forty years, astronomy, genetics and Earth sciences have advanced considerably, but Hoyle's initial skepticism about evolution and the origin of life has only been reinforced.
The first five chapters of this book make a strong case for cosmic ancestry, as I call it. From there, Hoyle's restless mind takes him even further, coming next to SETI and then the big bang vs. steady state cosmology (where Hoyle frankly admits some of his own wrong turns.) He blames darwinian nihilistic philosophy for much of the twentieth century's trouble. He wonders about quantum theory and free will, life in other media, the evolution of physical law, the religious tendency and a lot more.
Fred Hoyle was a master of many subjects, as well as a best-selling writer, so the text is instructive and a delight to read. The illustrations are superb. The book is no longer in print, but used copies are readily available.The Intelligent Universe by Fred Hoyle, Michael Joseph Limited, London 1983.
"...The Intelligent Universe: A summary & review," by Gert Korthof link.
Hoyle and Wickramasinghe's Analysis of Interstellar Dust has background.
An Interview with Fred Hoyle, 1996.
"A retroviral link to vertebrate myelination through retrotransposon-RNA-mediated control of myelin gene expression," by Tanay Ghosh et al., Cell, 15 Feb 2024.
"Ancient retroviruses played a key role in the evolution of vertebrate brains...," PhysOrg, 15 Feb 2024.
Viruses and Other Gene Transfer Mechanisms has links to many more examples of HGT.
Thanks, Kevin Keogh, for a link to commentary on Neuroscience News.com, 15 Feb 2024.
"The possibility of panspermia in the deep cosmos by means of the planetary dust grains," by Z.N. Osmanov, arXiv:2402.04990, 07 Feb 2024.
"Cosmic Dust Could Spread Life...," by Evan Gough, Univese Today, 13 Feb 2024.
Thanks, Google Alerts.
In cosmic ancestry whole cells must deliver life. Naked cells spread by radio-panspermia would need protection from radiation damage, but a coating of organics would allow some to survive. For protection from cosmic rays over long times, several feet of rock or ice would be needed. Comets, not considered in the new study can provide this.
— George Orwell, 1946.
In 2004, the Opportunity rover on Mars photographed tiny fossils that look biological. The shapes have features that closely match those of crinoids, sea animals related to starfish and sea urchins. The features include branching, segmenting, a flat-faced triangular crotch and a calyx-and-stem, all properly arranged and appropriate in size (see annotated image, right, cropped FoV c. 2x2 cm | uncropped image). I have occasionally shown these to NASA-affiliated scientists. Without exception, they have only glanced, or not, and dismissed the subject.
Last week, I contacted a distinguished former member of the Opportunity science team. He kindly replied with discussion of Viking and Opportunity, but his summary comment was, "...many structures interpreted as crinoid calices ...are actually small hematitic nodules formed during an episode of fluid flow through the sediment...." I wasn't sure he had looked at the right image, so I sent him a link to it. He replied, "The upper bit that looks like three structures in alignment could be interlocking hematite concretions; such things are observed regularly in Eagle crater images." Still not sure, I asked for a picture of the concretions he had in mind. He replied with this image that includes conjoined blueberries, taken in Eagle Crater on Sol 46 (next below, FoV 3x3 cm | larger image). He suggested we agree to disagree.
NASA's reluctance to look at its own image of the fossil seen on Sol 34 suggests hidden politics and/or willful blindness. Perhaps actually finding extraterrestrial life would give NASA political headaches it doesn't currently have. It seems NASA prefers to proceed very slowly, and to treat all evidence with maximum skepticism. The situation is frustrating.
A multi-disciplinary international team that has found and studied unfamiliar circles of RNA in microbes of human mouth and gut. With ∼1,000 nucleotides and an open reading frame, they code for proteins of unknown function. They have been named "Obelisks," because they form a rod-like secondary structure. Their affects on human health are not known.
In cosmic ancestry, evolution depends on genetic programming that is already available and software management systems that can navigate through it. If so, the discovery of functional sequences unanticipated by darwinian logic can be expected.
Evidence for deterministic evolution now comes from a computer analysis of several thousand complete E. coli genomes by an interdisciplinary trio at The University of Nottingham. ...our results lead us to suggest that it is likely that rewinding the tape back to the start of E. coli evolution would still result in hundreds or thousands of predictable events taking place that are not contingent on those highly unlikely events unique to each replaying of the tape.
In order for this evolution to work, genomes would need software management systems to correctly deploy or discard incoming genes. Such systems are suggested today, in commentary on the PNAS article.
Essentially the genomes themselves are their own microscopic ecosystems....
"DNA transfer between two different species mediated by heterologous cell fusion in Clostridium coculture," by Kamil Charubin, John D. Hill and Eleftherios Terry Papoutsakis, mBio, 12 Jan 2024.
"New insights into microbial evolution," by Erica K. Brockmeier, UDaily (+PhysOrg), 12 Jan 2024.
New genes can be acquired only via HGT... This posting has become our hub for news about prokaryotic evolution.
Viruses... discusses transformation, conjugation and transduction, better-known means of bacterial gene transfer.
Opportunity Rover Finds Strong Evidence Meridiani Planum Was Wet, release 2004-074, JPL, NASA, 02 Mar 2004.
The "one rule" is extremely troubling, because only a week earlier, February 27, Opportunity had photographed a fossil resembling a tiny sea animal. Without explanation, within three hours, NASA used the rock abrasion tool (RAT) to obliterate it. In December, NASA published the before-and-after photos of the fossil, not mentioning life:
Remember, in 1976, the Viking landers looked for life on Mars and got positive results. Then those results were disputed. More investigation would help, right? Inexplicably, no following Mars missions have carried life-detection equipment. Nevertheless, in 2004, Opportunity wandered into visible evidence for past metazoan life! So, NASA quickly destroyed the evidence and refused to discuss the subject? To be blunt, WTF?!With that bit out of the way, this is a very readable book for a general audience, with plenty to teach advanced readers. The style is fun and relaxed, with helpful word pictures and amusing asides. Knoll is a respected and honored geologist who is also a friendly, expert tourguide.
A Brief History of Earth: Four Billion Years in Eight Chapters by Andrew H. Knoll, Custom House, 27 Apr 2021.
Life on Mars! has background and links about Viking.
Our estimates of the timing of sweeps suggest that alleles associated with live-bearing were recruited gradually over the past 200,000 generations (~100,000 years). This finding is relevant to long-standing debate about the genetic basis of evolutionary novelty. Because key innovations are not visible to selection before they arise, models of saltational evolution invoke large-effect macromutations to explain their evolution. We do not know which mutation caused the threshold from egg-laying to live-bearing to be crossed. Some potentiating mutations may have preceded live-bearing but were critical to its origin, and others may have refined live-bearing after it arose. Nevertheless, our results suggest that new functions evolved gradually through the recruitment of alleles at many loci rather than arising in a single evolutionary step.The main lesson that the researchers take from the study is that big steps in evolution can "evolve gradually," an issue even Charles Darwin worried about. Fossil evidence of punctuated equilibrium and the growing understanding of genomics have only highlighted the challenge. In this example, the genes have been slowly recruited, then turned on when the need is present. But this still leaves an issue mentioned in the conclusion, "key innovations are not visible to selection before they arise." This innovation, following longterm, multi-gene recruitment, would likewise remain invisible to selection until the programming is fully installed and expressed. This would work only if the recruited genes already contain the programming for vivipary. If so, software management sytems in the genome could plausibly piece it together. Cosmic ancestry relies on the availability of life's programming, and its installation by robust software management.
"The genetic basis of a recent transition to live-bearing in marine snails," by Sean Stankowski et al., Science, 05 Jan 2024; and commentary;
"Biologists uncover the secrets of evolutionary change," University of Sheffield (+Newswise), 04 Jan 2024.
"The snail or the egg?" Institute of Science and Technology Austria via Newswise, 04 Jan 2024.
Robust Software Management has more about the role of a system that can assemble available programming.