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NANOBE CONTROVERSY. "Martian meteorites such as ALH84001 have been speculated to contain trace fossils of nanobacteria. The softball-sized igneous meteorite shows microscopic worm-like and "ovid" nanofossils." https://lnkd.in/dBbSDUB View in LinkedIn

NANOBES IN METEORITE. “The Martian meteorite ALH84001, discovered in 1984 in the Antarctic, contained similar tubular structures which some astrobiologists suggested could be evidence of life at an earlier time on Mars.” Long live Fred Hoyle! https://lnkd.in/eckY5qA View in LinkedIn

SMALLEST CREATURES include mycoplasma, the smallest known bacteria (300 nm), and Nanoarchaeum—smallest known archaeum (400 nm), Parvovirus—smallest known viruses (18-28 nm), Prion—smallest known infectious agent (≈10 nm), Ultramicrobacteria—possible dormant forms of larger cells (200 nm).” https://lnkd.in/eckY5qA View in LinkedIn

THE SAME SIZE AS VIRUSES. “Nanobes are about 20 nm in diameter, which may be too small to contain the basic elements for an organism to exist (DNA, ribosomes, etc.), suggesting that if they grow and reproduce they would need to do so in an unconventional way.” https://lnkd.in/eckY5qA View in LinkedIn

NOT NANOBACTERIA. “Nanobes are similar in size to nanobacteria, which are also structures that have been proposed to be extremely small living organisms. However, these two should not be confused. Nanobacteria are thought to be cellular organisms, while nanobes are hypothesized to be a previously unknown form of life or protocells.” https://lnkd.in/eckY5qA View in LinkedIn

NANOBACTERIA. "Recent evidence suggests a role for nanobacteria in a growing number of human diseases, including renal stone formation, cardiovascular diseases, and cancer. This large body of research studies promotes the view that nanobacteria are not only alive but that they are associated with disease pathogenesis." https://lnkd.in/dvNtRzz View in LinkedIn

GLACIAL TRIGGER. “Chemical weathering associated with the erosion that formed the Great Unconformity likely pulled the greenhouse gas carbon dioxide out of the atmosphere, sequestering vast quantities in the ocean and lithosphere. This “primed the pump for the glaciations.” https://lnkd.in/ddDSSXe View in LinkedIn

SO ENDS this two weekends on the Great Unconformity. Admittedly, the biblical push for a Great Flood interpretation has polarized the debate, where the flood needed a lot of water in a short time. " "And the Cambrian Explosion camp resolutely dug in their heels to new ideas, having built careers on the convoluted explanations of an improbable sudden emergence of diversity with no antecedent history. And so we are left with the grinding of a glacial paradigm shift emerging on this massively important topic. https://lnkd.in/d5T7qzX View in LinkedIn

SUBDUCTION. “Moreover, plate tectonic reconstructions suggest that much of the remaining sediment deposited during the latest Precambrian and Early Cambrian would have been subducted or accreted and destroyed at the Delamerian‐Ross subduction zone, which initiated in the Cambrian. The rock record, and therefore the fossil record, is probably particularly poor during the precise interval over which the first animals are predicted to have diversified and radiated, despite the apparently excellent potential for soft tissue preservation at this time.” https://lnkd.in/d8SyHX7 View in LinkedIn

NEW THINKING. “Although quantitative studies have yet to be undertaken in the Precambrian, it is clear that the rock record from the critical interval around the Precambrian‐Cambrian boundary is less complete than we might like. In many localities around the world, shallow‐marine Cambrian or Ordovician rocks lie unconformably above Precambrian rocks. This “Great Unconformity” records a prolonged period of continental denudation in the latest Neoproterozoic followed by a major marine transgression, suggesting that many latest Ediacaran shallow‐marine rock sequences – reflecting environments that may be expected to contain the highest diversity of animal life – have been eroded away.” https://lnkd.in/d8SyHX7 View in LinkedIn