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Earth Science

Fossil Hunters Find Evidence of 555 Million-Year-Old Human Relative (theguardian.com) 75

It might not show much of a family resemblance but fossil hunters say a newly discovered creature, that looks like a teardrop-shaped jellybean and is about half the size of a grain of rice, is an early relative of humans and a vast array of other animals. From a report: The team discovered the fossils in rocks in the outback of South Australia that are thought to be at least 555 million years old. The researchers say the diminutive creatures are one of the earliest examples of a bilateral organism -- animals with features including a front and a back, a plane of symmetry that results in a left and a right side, and often a gut that opens at each end. Humans, pigs, spiders and butterflies are all bilaterians, but creatures such as jellyfish are not. Dr Scott Evans, of the Smithsonian National Museum of Natural History and a co-author of the research, said: "The major finding of the paper is that this is possibly the oldest bilaterian yet recognised in the fossil record. "Because humans are bilaterians, we can say that this was a very early relative and possibly one of the first on the diverse bilaterian tree of life."

Writing in the Proceedings of the National Academy of Sciences, Scott and colleagues in the US and Australia report how they made their discovery in sandstone at sites including fossil-rich Nilpena. They say careful analysis ruled out the possibility that the fossils were actually formed by the action of currents or from microbial mats. The animal has been named Ikaria wariootia in reference to an Indigenous term for Wilpena Pound, a nearby landmark, and the Warioota Creek that is close to the sites of the find.

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Fossil Hunters Find Evidence of 555 Million-Year-Old Human Relative

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  • by bobstreo ( 1320787 ) on Monday March 23, 2020 @03:14PM (#59863892)

    But at least they didn't specify what brand of Jelly Bean.

  • by 140Mandak262Jamuna ( 970587 ) on Monday March 23, 2020 @03:29PM (#59863948) Journal
    You have nothing to lose but your clades!

    The biologists are the most divisive people in the world, constantly seeking what divides us rather that what unites us. "Got three floating ribs? Yeah, you are a true finch. No? You are not a finch!". They turn a blind eye to the 99.999% agreement between individuals and pick on one thing that is different and divide them into different clades.

    These high priests of division, worshiping at the altar of their Lord and Master Linnaeus, wont rest till each one of use, every individual is given his own or her own place in the cladogram.

    It is time we show them the stuff we are made of. From the lowly bit of RNA that never acknowledges the designation these biologists conferred on it, covid-19 all the way to advanced form of life that could conceive a nation of laws, we all should stand united!

    • Say what you want, but I am voting for the true finch. Don't throw your vote away.
    • Linaeus was a lumper!

      No, seriously. And particularly in respect of the Plantae, an awful lot of his classifications were being revised, long before Crick and Watson, let alone the development of genetic sequencing. Classical morphology and developmental morphology applied with microscope and a small amount of some stains.

      Sorry, but when you're looking to see if this is different to that, cladistics is the way to go, concentrating, as it does and as you say, on differences between organisms.

  • Congratulations. You've discovered Senators.

  • Well, if this has a mouth at one end, and an asshole at the other, I can see how this could be an ancestor to humans.

    • Which came first, the mouth or the anus?

      Again, "no, seriously". Are you a protostome or a deuterostome? Then, are you a bilaterian? Then are you an ecdysozoan or a lophotrochozoan, or even a chaetognath (yeah, good keyboard skills there!)

  • >> often a gut that opens at each end.
    So it has an a-hole, eh?

    • Not the first such animal. Protozoans with a hard "skin" have cytostomes and cytopyges. A kid should remember at least that from high school -- Beavis, the cell's ass is "cytopyge", uh huh huh.

  • Distant ancestor of almost all animal life, in fact.
    Yes I know ancestors are relatives too, but this one is SO distant that even the first fishes are its remote descendants, never mind land animals.

    • Yes, distant ancestor. But looking at the title of the topic the relationship shows up more clearly on some people.

    • Somewhat fish-shaped organisms (with v-shaped muscle masses, and an anterior collection of sensory cells, possibly a lateral line, and an arguable dorsal nerve cord) were reported well over a decade ago from the Chenjiang fauna of N.China [wikipedia.org], and a mere 20-25 million years later. That's less time than the entire radiation of the Great Apes, of which you are a member.
  • Of all the places I never expected to see retards attempting to claim Intelligent Design or divine creation were a valid scientific hypothesis, I expected it on this site the least.

    Your imaginary friends do not and have never existed. Your faith is stupid. All religions, especially Abrahamic religions, are nothing but a disgusting cancer. Fuck your beliefs, fuck your imaginary friends and most of all, FUCK YOU!

    When you can back your stupid hypothesis with peer review, consensus and actual evidence people

    • There are a depressing number of religious retards on this site. Whether the number is more or less than in an average slice of American society, I leave as an exercise for an American. I just try my hardest to make them feel unwelcome.

      And yes, the problem does seem to be strongly associated with monotheistic religions, and particularly the Abrahamic ones - which are all of the major monotheisms, all worshipping the same non-existent god. There's probably some relationship with the religion structure encou

  • The paper is here [pnas.org]. It is paywalled, so if you don't have institutional access ,you might need to search for that link under Sci-hub [sci-hub.tw] (grab the address link I gave above, paste it into the initial Sci-Hub seach box and hit the "key" ; the servers are a bit creaky today - probably under DRM-profiteer attack.)

    Title "Discovery of the oldest bilaterian from the Ediacaran of South Australia" - well, " Here, we describe Ikaria wariootia gen. et sp. nov. from the Ediacara Member, South Australia" so pretty definiti

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