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    Keir’s small boats plan won’t deter ANYONE – hapless French will let them loose to do it again, immigration boss slams

    Keir’s small boats plan won’t deter ANYONE – hapless French will let them loose to do it again, immigration boss slams

    Charles warns small boats crisis is a ‘profound challenge’ as he hosts Macron at state banquet ahead of migrant ‘deal’

    Charles warns small boats crisis is a ‘profound challenge’ as he hosts Macron at state banquet ahead of migrant ‘deal’

    Jeremy Corbyn’s planned hard-left party of two in chaos as he refuses to confirm who’ll lead it

    Jeremy Corbyn’s planned hard-left party of two in chaos as he refuses to confirm who’ll lead it

    Keir insists he’s still backing Reeves after ‘late-night talks’ as he tries to steady ship after Commons chaos

    Keir insists he’s still backing Reeves after ‘late-night talks’ as he tries to steady ship after Commons chaos

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        Keir’s small boats plan won’t deter ANYONE – hapless French will let them loose to do it again, immigration boss slams

        Keir’s small boats plan won’t deter ANYONE – hapless French will let them loose to do it again, immigration boss slams

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        Jeremy Corbyn’s planned hard-left party of two in chaos as he refuses to confirm who’ll lead it

        Jeremy Corbyn’s planned hard-left party of two in chaos as he refuses to confirm who’ll lead it

        Keir insists he’s still backing Reeves after ‘late-night talks’ as he tries to steady ship after Commons chaos

        Keir insists he’s still backing Reeves after ‘late-night talks’ as he tries to steady ship after Commons chaos

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            ‘Death date’ of universe revealed as scientists predict when ‘shrinking’ will start before ‘Big Crunch’ wipes us all out

            ‘Death date’ of universe revealed as scientists predict when ‘shrinking’ will start before ‘Big Crunch’ wipes us all out

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            Is this the breakfast of the future? Bread made of BUGS & fungus created to fight food shortage – so would YOU try it?

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            Mystery of Captain Cook’s lost ship is SOLVED after 250 years as scientists discover sunken remains of HMS Endeavour

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            Huge number of horses’ facial expressions revealed as scientists discover equine ‘language’

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          • Science

            We’ve probably already been discovered by aliens, but they have some pretty good reasons to hide.

            Almost everyone is said to benefit from a scientifically supported method for improving sleep.

            2,500-year-old rock engravings were found near Mosul, Iraq.

            Is the soul of a person eternal? the findings of scientists

            With its most recent move, is General Electric abandoning wind power?

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            Jon Jones performs retirement U-turn and announces return to UFC testing pool after Dana White lying claims

            Jon Jones performs retirement U-turn and announces return to UFC testing pool after Dana White lying claims

            Tyson Fury heads off to business meeting still wearing Primark Soccer Aid suit after dropping F-bomb live on ITV

            Tyson Fury heads off to business meeting still wearing Primark Soccer Aid suit after dropping F-bomb live on ITV

            ‘This’ll wind people up’ – DeChambeau and Rose’s response to how club golfers would cope at Oakmont US Open course

            ‘This’ll wind people up’ – DeChambeau and Rose’s response to how club golfers would cope at Oakmont US Open course

            UFC 316 – Merab Dvalishvili vs Sean O’Malley 2: Fight time, full card, TV channel and live stream ahead of huge rematch

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            Olympics gender row boxer Imane Khelif BANNED from next week’s World Cup as chiefs introduce mandatory sex testing

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          Terrifying ‘living fossil’ that has survived for 150 million years has killer alligator-style jaw and lurks in US lakes

          by Anderson
          March 13, 2024
          in Tech
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          GARS have been classified as one of the oldest living fossils in a newly published study.

          The study, published in the journal Evolution and conducted by researchers at Yale, looked at gars for their incredibly slow evolution.

          Terrifying ‘living fossil’ that has survived for 150 million years has killer alligator-style jaw and lurks in US lakes
          Getty

          Gars have been classified as one of the oldest living fossils in a newly published study[/caption]

          “We show that gars’ slow rate of molecular evolution has stymied their rate of speciation,” said Thomas J. Near, professor of Ecology and Evolutionary Biology in Yale’s Faculty of Arts and Sciences and the paper’s senior author, per Phys.Org.

          “Fundamentally, this is the first instance where science is showing that a lineage, through an intrinsic aspect of its biology, fits the criteria of living fossils.”

          THE GAR

          One of the most ancient groups of ray-finned fish, gars belong to the family Lepisosteidae.

          The fish have elongated bodies and similarly elongated jaws that contain long, sharp teeth.

          The largest type of gar – the alligator gar – often grows to a length of over 6.5 feet and can weigh over 100 pounds.

          LIVING FOSSILS

          All of the jawed vertebrates, which comprise roughly 60,000 species, gars have the slowest rate of molecular evolution.

          Basically, this means that their genome has changed very little since their ancestors originated around 150 million years ago.

          “Gars are notable for their low anatomical variation,” the study reads.

          “The earliest fossil gars from the Jurassic are nearly identical to living species, and recognizable members of living genera appear in the fossil record as early as the middle Cretaceous.”

          This very little change in their physical form, and when compared to extinct ancestors, are two of three characteristics that make gars a “living fossil,” lead author Chase Brownstein told Live Science.

          The third is that the species has diversified into a small number of related species.

          For the study, researchers used computer analysis to study gene sequences that came from common ancestors.

          This is known as orthologs and helped to determine the rates of mutation, or gene substitution over time. 

          “Once a mutation fixes and changes a particular DNA sequence, it becomes a substitution,” Brownstein said.

          The researcher added that identifying exactly how the genomes of gars have remained so stable is of big interest.

          “There’s a mechanism behind the low substitution rate as well,” he said.

          “There’s some sort of apparatus that we think is probably related to DNA repair.”

          The team hopes to analyze their findings further as this research could offer insight into the genetic health of humans – and particularly, cancer-related issues.

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