Weird "wheel animals" wriggle back to life after 24,000 years frozen By Michael Irvin

dewanand · 8 juni 2021, 12:15

beetje griezelig, kan het zijn dat covid19 iets hiermee te maken heeft?? Deze oude soort van 24.000 jaar geleden is superieur tov de nieuwe The Bdelloid rotifers, or “wheel animals” of zijn zij INFERIEUR??

Veel nieuwe SF films gaan nu over Monsters uit prehistorie, die ontwaken uit Hybernatie en alles vernietigen, uitmoorden, hopeloos.

Hoe gevaarlijk is dit?? of gebeurt dit elke week nu, omdat de ijskappen nu toch smelten en honderden biljoenen oude beestjes nu ontwaken na miljoenen jaren hyernatie slaap in cryostase.

in het commentaar onder staat eea verklaard biochemisch, moleculair, leuk.

-------------------------- citaat hele tekst: newatlas.com

https://newatlas.com/science/bdelloi...rs-permafrost/

Science
Weird "wheel animals" wriggle back to life after 24,000 years frozen
By Michael Irving
June 07, 2021

Scientists have managed to revive microscopic animals that had been frozen in the Siberian permafrost for 24,000 years. The Bdelloid rotifers, or “wheel animals” as they’re sometimes called, shook off their long sleep and went right back to moving, eating and reproducing like the Ice Age was only yesterday.

Bdelloid rotifers are tiny tubular creatures that are surprisingly tough. In that way, rotifers are a lot like tardigrades, except that the latter eats the former. When conditions get too cold or dry for them, rotifers will curl up into a ball and dry out, hibernating for months or years until conditions become more favorable again.

But now the little critters have absolutely smashed their previous record of about 10 years. In this case, the researchers used radiocarbon dating to determine that the permafrost from which they were recovered was between 23,960 and 24,485 years old. As if that wasn’t impressive enough, the rotifers were still able to reproduce through their usual asexual process, called parthenogenesis.

The researchers examined these second generation rotifers more closely, and found that while they were very closely related to modern ones, they’re different enough to constitute a new species. Next, to examine just how the animals might survive such extreme conditions, the researchers froze some of these rotifers at -15 °C (5° F) for one week, then thawed them out and watched them reawaken.

While most multicellular forms of life are damaged by the formation of ice crystals, rotifers seem to be able to protect their cells and organs from this damage. Exactly how remains unknown at this point, the team says.

As impressive as a 24,000 year slumber is, these rotifers don’t actually hold the record. Worms called nematodes have wriggled back to life after about 40,000 years, while a batch of bacteria has them both beat at an astonishing 100 million years. Still, rotifers may be the most complex creatures in the club so far.

"The takeaway is that a multicellular organism can be frozen and stored as such for thousands of years and then return back to life – a dream of many fiction writers," says Stas Malavin, an author of the study. "Of course, the more complex the organism, the trickier it is to preserve it alive frozen and, for mammals, it's not currently possible. Yet, moving from a single-celled organism to an organism with a gut and brain, though microscopic, is a big step forward.”

The research was published in the journal Current Biology.

Source: Cell Press via Scimex
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WB June 7, 2021 02:26 PM
hmm what could go wrong... they made some horror flicks about this type of thing....

VicCherikoff June 7, 2021 07:02 PM
Not hard to work out how they do it. Just measure the concentration of trehalose (Resurrection Sugar). This amazing sugar surrounds each molecule with water and stops the water from freezing or getting lost from dehydration. During the freezing, the organism's proteins and lipids are preserved. Trehalose is common in many different species, including plants.

https://newatlas.com/science/bdelloi...rs-permafrost/
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8 juni 2021, 12:15	#1
dewanand Minister-President Geregistreerd: 30 april 2005 Locatie: delft Berichten: 4.597	Weird "wheel animals" wriggle back to life after 24,000 years frozen By Michael Irvin beetje griezelig, kan het zijn dat covid19 iets hiermee te maken heeft?? Deze oude soort van 24.000 jaar geleden is superieur tov de nieuwe The Bdelloid rotifers, or “wheel animals” of zijn zij INFERIEUR?? Veel nieuwe SF films gaan nu over Monsters uit prehistorie, die ontwaken uit Hybernatie en alles vernietigen, uitmoorden, hopeloos. Hoe gevaarlijk is dit?? of gebeurt dit elke week nu, omdat de ijskappen nu toch smelten en honderden biljoenen oude beestjes nu ontwaken na miljoenen jaren hyernatie slaap in cryostase. in het commentaar onder staat eea verklaard biochemisch, moleculair, leuk. -------------------------- citaat hele tekst: newatlas.com https://newatlas.com/science/bdelloi...rs-permafrost/ Science Weird "wheel animals" wriggle back to life after 24,000 years frozen By Michael Irving June 07, 2021 Scientists have managed to revive microscopic animals that had been frozen in the Siberian permafrost for 24,000 years. The Bdelloid rotifers, or “wheel animals” as they’re sometimes called, shook off their long sleep and went right back to moving, eating and reproducing like the Ice Age was only yesterday. Bdelloid rotifers are tiny tubular creatures that are surprisingly tough. In that way, rotifers are a lot like tardigrades, except that the latter eats the former. When conditions get too cold or dry for them, rotifers will curl up into a ball and dry out, hibernating for months or years until conditions become more favorable again. But now the little critters have absolutely smashed their previous record of about 10 years. In this case, the researchers used radiocarbon dating to determine that the permafrost from which they were recovered was between 23,960 and 24,485 years old. As if that wasn’t impressive enough, the rotifers were still able to reproduce through their usual asexual process, called parthenogenesis. The researchers examined these second generation rotifers more closely, and found that while they were very closely related to modern ones, they’re different enough to constitute a new species. Next, to examine just how the animals might survive such extreme conditions, the researchers froze some of these rotifers at -15 °C (5° F) for one week, then thawed them out and watched them reawaken. While most multicellular forms of life are damaged by the formation of ice crystals, rotifers seem to be able to protect their cells and organs from this damage. Exactly how remains unknown at this point, the team says. As impressive as a 24,000 year slumber is, these rotifers don’t actually hold the record. Worms called nematodes have wriggled back to life after about 40,000 years, while a batch of bacteria has them both beat at an astonishing 100 million years. Still, rotifers may be the most complex creatures in the club so far. "The takeaway is that a multicellular organism can be frozen and stored as such for thousands of years and then return back to life – a dream of many fiction writers," says Stas Malavin, an author of the study. "Of course, the more complex the organism, the trickier it is to preserve it alive frozen and, for mammals, it's not currently possible. Yet, moving from a single-celled organism to an organism with a gut and brain, though microscopic, is a big step forward.” The research was published in the journal Current Biology. Source: Cell Press via Scimex We recommend 2 comments Sign in to post a comment. Please keep comments to less than 150 words. No abusive material or spam will be published. WB June 7, 2021 02:26 PM hmm what could go wrong... they made some horror flicks about this type of thing.... VicCherikoff June 7, 2021 07:02 PM Not hard to work out how they do it. Just measure the concentration of trehalose (Resurrection Sugar). This amazing sugar surrounds each molecule with water and stops the water from freezing or getting lost from dehydration. During the freezing, the organism's proteins and lipids are preserved. Trehalose is common in many different species, including plants. https://newatlas.com/science/bdelloi...rs-permafrost/ ------------------------ __________________ Kritisch Podium Dewanand http://www.dewanand.com