Fossils of the Tennessee Valley by Richard Keyes, 130 pages, ∼2,500 illustrations, ∼100 references, ISBN:978-0-9970031, RGEO, Dec 2015 [amazon listing].
Keyes is well aware of the crinoid-like fossil photographed with the Microscopic Imager of NASA's Opportunity rover, 27 Feb 2004, at Mars' Meridiani Planum:
A fossil on Mars... is our main entry for the fossil seen by Opportunity.
Open-access enumeration of NASA's criteria for recognizing extraterrestrial life or its fossils, including a rebuttal to David S. McKay et al., NASA, 1996: Life on Mars!
Hoover discusses the evidence for fossilized microbial life in meteorites, and the crinoid-like fossil seen on Mars. We just became aware of this video.
...Microfossils in a Carbonaceous Meteorite and
A fossil on Mars... have more with related links.
Molecular biologists have studied the "evolution" of an important family of genes. The educated public expects the analysis to probe how the genes may have originated. But it's actually a phylogenetic analysis. It tells us only how they descended and varied after the earliest time they are identified. Our findings suggest that [versions of all 3 types] were already present in the cnidarian-bilaterian common ancestor. In fact, genes without discernable origins are the usual finding. And mainstream science seems comfortable with the ambiguous meaning of "evolution".
Metazoan Genes Older Than Metazoa? and
Genes Older Than Earth? are relevant.
A viral RNA hijacks host machinery using dynamic conformational changes of a tRNA-like structure by Steve L. Bonilla et al., doi:10.1126/science.abe8526, Science, 18 Nov 2021.
10 Feb 2013: Thomas Nagel affirms our observation (see italicised quotation.)
Robust Software Management... (incomplete) has comments and examples of life's complexity.
A chickpea genetic variation map based on the sequencing of 3,366 genomes, by Varshney, R.K., Roorkiwal, M., Sun, S. et al., Nature (Open Access), doi:10.1038/s41586-021-04066, 10 Nov 2021.
Thanks, Google Alerts. Viruses... has more about HGT.
NASA should think anew. In 1976, the Viking life-detection experiments got positive results, but NASA ignored that because no organics were detected.
Organic molecules revealed in Mars's Bagnold Dunes by Curiosity's derivatization experiment by Millan, M., Teinturier, S., Malespin, C.A. et al., Nature Astronomy, 01 Nov 2021.
NASA just found these organic molecules on Mars for the first time by Passant Rabie, Inverse.com, 01 Nov 2021.
Organic molecules revealed on Mars by Curiosity's new kind of experiment by Bob Yirka , Phys.org, 03 Nov 2021.
Thanks, Stan Franklin and Kenneth Augustyn. Life on Mars! has updates.
Call for a framework for reporting evidence for life beyond Earth by James Green et al., Nature, 28 Oct 2021.
These NASA scientists restate (understate) the case for life contained in ALH84001 from Mars. They don't mention the Viking LR experiment. In Comments, I point to the crinoid-like fosslls seen by the Opportunity rover in 2004.
"White Paper Report from the Biosignatures Standards of Evidence Community Workshop" by of the Biosignature Standards of Evidence Workshop Participants, accessed 28 Oct 2021 [Draft].
This 77-page draft on the same themes follows a July joint conference with Nexus for Exoplanet System Science (NExSS) and the Network for Life Detection (NfoLD). Viking gets discussed, but discounted. In invited feedback I again mention Opportunity.
Thanks again, Richard Hoover, for alerting me about Opportunity.
Life on Mars! has history and related links, including Sea Lilies on Ancient Mars?
Viruses and Other Gene Transfer Mechanisms has many relevant examples.
Nanometre-scale imaging and AI reveal the interior of whole cells by Jason R. Swedlow and Lucy Collinson, Nature, 25 Oct 2021.
...cells – as never seen before by Diana Kwon, Nature, 26 Oct 2021.
Life Is Cells is our answer to the question, What Is Life?
Computer Models of Evolution discusses our skepticism.
NASA's Perseverance Sheds More Light on Jezero Crater's Watery Past, Nasa.gov, 07 Oct 2021.
26 Jul 2013: Did NASA's Opportunity rover find evidence for life on Mars in 2004? 28 Oct 2015: More.
Life on Mars! has history and related links.
The Archean origin of oxygenic photosynthesis and extant cyanobacterial lineages by G. P. Fournier et al., doi:10.1098/rspb.2021.0675, Proceedings of the Royal Society B, 29 Sep 2021.
Zeroing in on the origins of Earth's "single most important evolutionary innovation" by Jennifer Chu, MIT News Office, 28 Sep 2021.
Viruses and Other Gene Transfer Mechanisms has more. Search for "photosynthesis".
Genes Older Than Earth? mentions genes for oxygen metabolism that were "born" too early.
A Strange Comet Erupted 4 Times in a 'Super Outburst' by Robin George Andrews, The New York Times, 30 Sep 2021.
Comet 29P Undergoes Brightest Outburst in Recent Years by Bob King, Sky & Telescope, 29 Sep 2021.
Comets: The Delivery System has history and related links.