Hierdie dier het oorleef 24,000 jaar gevries in die Siberiese permafrost

'n Mikroskopiese dier het weer lewendig geword nadat hy in die Arktiese permafrost gesluimer het 24,000 jare.

Bdelloide rotifers leef tipies in waterige omgewings en het 'n ongelooflike vermoë om te oorleef. Russian scientists found the creatures in a core of frozen soil extracted from the Siberian permafrost using a drilling rig.
Our report is the hardest proof as of today that multicellular animals could withstand tens of thousands of years in cryptobiosis, the state of almost completely arrested metabolism,” said Stas Malavin, a researcher at the Soil Cryology Laboratory at the Pushchino Scientific Center for Biological Research in Russia.
    Rotifers have an incredible ability to survive harsh environments.

    Vroeër navorsing by other groups had shown that the rotifers could survive up to 10 years when frozen. In a new study, the Russian researchers used radiocarbon dating to determine that the critters they recovered from the permafrostground that is frozen year-round, apart from a thin layer near the surfacewere about 24,000 jaar oud.
      The study was published in the journal Current Biology Maandag.
        It’s not the first time ancient life has been resurrected from a permanently frozen habitat.
        Stems of Antarctic moss were successfully regrown from a 1,000-year-old sample that had been covered by ice for about 400 jare, and a living campion flower was regenerated from seed tissue, likely stored by an Arctic squirrel, that had been preserved in 32,000-year-old permafrost. Simple worms, called nematodes, were revived from the permafrost from two places in northeastern Siberia, in sediments that were more than 30,000 jaar oud.
          Long-dead but well-preserved mammals, including extinct cave bears and mammoths, have also been unearthed from the permafrost, which is thawing in some places as a result of the climate crisis.
          Malavin said that it is highly unlikely bigger life forms could survive being frozen in this way.
          The takeaway is that a multicellular organism can be frozen and stored as such for thousands of years and then return back to lifea dream of many fiction writers,” Malavin said in the statement.
          “Natuurlik, the more complex the organism, the trickier it is to preserve it alive frozen and, for mammals, it’s not currently possible. Tog, moving from a single-celled organism to an organism with a gut and brain, though microscopic, is a big step forward.
          Once the rotifer thawed, the creature was able to reproduce, het die studie gesê. Die tiny invertebrates were also able to feed.
            To understand how the creature survived in suspended animation in the frozen ground, the researchers froze and thawed modern day rotifers living in permafrost regions. They found that the creatures could withstand the formation of ice crystals while they were slowly frozen.
            While not all the rotifers survived the freezing process, the study suggested that the creatures have some mechanism that can can shield their cells and organs from harm at very low temperatures.

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