Russian scientists found the tiny, ancient animal called the
bdelloid rotifer in soil taken from the river Alazeya in
Russia's region of Yakutia in the far north.
The bdelloid rotifer, a multicellular organism found in
freshwater habitats across the world, is known to be able to
withstand extreme cold.
Previous research suggested it could survive for a decade when
frozen at -20 degrees Celsius.
This new case, which was detailed in a study https://www.cell.com/current-biology/fulltext/S0960-9822(21)00624-2
in the journal Current Biology, is by far the creature's longest
recorded survival period in a frozen state.
The organism was recovered from samples taken 3.5 metres below
ground. The material was dated from between 23,960 and 24,485
years ago, the study said.
Land encased in permafrost - where the ground is frozen all year
round - has for years thrown up startling scientific
discoveries.
Scientists earlier revived microscopic worms called nematodes
from sediment in two places in northern Siberia that were dated
over 30,000 years old.
(Reporting by Tom Balmforth; editing by Giles Elgood)
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