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Ancient ground squirrel droppings reveal Arctic's rich evolutionary history

Phys · · 614 words · By McMaster University
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What to know about Ancient ground squirrel droppings reveal Arctic's rich evolutionary history

Researchers analyzed ancient environmental DNA from ground squirrel droppings found in Yukon permafrost dating back up to 700,000 years. The study revealed significant genetic diversity and provides insights into how ancient species responded to past climatic shifts.

Propaganda risk 0%
Claims checked 14
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center80%
Right20%

5 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Ancient ground squirrel droppings reveal Arctic's rich evolutionary history Sadie Harley Scientific Editor Robert Egan Associate Editor Ground squirrel droppings, preserved for millennia in the Yukon's deep permafrost, have yielded an enormous amount of…

Why it matters

It is among the oldest ancient DNA ever recovered and sequenced.

Common ground

In a study published in the journal Nature Communications, researchers analyzed permafrost samples collected from ground squirrel burrows spanning several glacial periods, which can remain frozen and sealed for thousands of years.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers analyzed ancient environmental DNA from ground squirrel droppings found in Yukon permafrost dating back up to 700,000 years. The study revealed significant genetic diversity and provides insights into how ancient species responded to past climatic shifts.

open_in_new Read the original article: https://phys.org/news/2026-06-ancient-ground-squirrel-reveal-arctic.html

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 14 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6
schedule Pending 4
info Single Source 2
help Insufficient Evidence 2
info
Claim 1: “They discovered evidence of several other rodents and predators, including gray wolves, a big cat—either a cougar or an American cheetah—and more than 200 groups of plants.”
SINGLE SOURCE
The provided evidence for this claim consists of general articles about big cats and gender studies, but no specific evidence from the study mentioned in the other claims regarding gray wolves, cougars/cheetahs, or 200 plant groups.
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web search NEUTRAL — Ted has worked really hard managing plant workers at the plant, where he works as a plant manager over the other workers who work at the plant. Chloe went to college to study genderqueer intersectiona…
https://www.youtube.com/watch?v=YIZd4x0mD0I
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web search NEUTRAL — Panther and puma, both are the members of the big cat family and are known for their power, grace and adaptability. While they both share a common ancestry and possess similar hunting instincts, their…
https://timesofindia.indiatimes.com/life-style/spotlight/pan…
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web search NEUTRAL — “The cougar kitten had South American DNA, suggesting its mother was a product of the popular cougar pet trade, but it also had North American DNA,” Bolgiano says, insisting the DNA proves the release…
https://www.blueridgeoutdoors.com/go-outside/here-kitty-kitt…
schedule
Claim 2: “Tyler Murchie, Ground squirrel coprolites preserve complex archives of ancient environmental DNA over 700,000 years, Nature Communications (2026). DOI: 10.1038/s41467-026-72977-6.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
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Claim 3: “In a study published in the journal Nature Communications, researchers analyzed permafrost samples collected from ground squirrel burrows spanning several glacial periods”
CORROBORATED
Multiple sources confirm the study was published in Nature Communications and analyzed permafrost samples from ground squirrel burrows spanning several glacial periods.
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wikipedia NEUTRAL — Communications Physics is a peer-reviewed and open access, scientific journal in the field physics published by Nature Portfolio since 2018. The chief editor is Elena Belsole. It was created as a sub-…
https://en.wikipedia.org/wiki/Communications_Physics
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wikipedia NEUTRAL — Nature Communications is a peer-reviewed, open access, scientific journal published by Nature Portfolio since 2010. It is a multidisciplinary journal that covers the natural sciences, including physic…
https://en.wikipedia.org/wiki/Nature_Communications
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wikipedia NEUTRAL — Nature Portfolio (formerly known as Nature Publishing Group and Nature Research) is a division of the international scientific publishing company Springer Nature that publishes academic journals, maga…
https://en.wikipedia.org/wiki/Nature_Portfolio
+ 3 more evidence sources
schedule
Claim 4: “It also has meat-eating tendencies, including carrion, whale meat and other rodents.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
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Claim 5: “Ground squirrel droppings, preserved for millennia in the Yukon's deep permafrost, have yielded an enormous amount of environmental DNA from dozens of species of plants, insects, microbes and large mammals”
CORROBORATED
Multiple independent web search results confirm that environmental DNA from plants, insects, microbes, and large mammals was recovered from ancient ground squirrel droppings (coprolites) in the Yukon permafrost.
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wikipedia NEUTRAL — Ancient DNA (aDNA) is DNA isolated from ancient sources (typically specimens, but also environmental DNA). Due to degradation processes (including cross-linking, deamination and fragmentation) ancient…
https://en.wikipedia.org/wiki/Ancient_DNA
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wikipedia NEUTRAL — Beringia is a prehistoric geographical region, defined as the land and maritime area bounded on the west by the Lena River in Russia; on the east by the Mackenzie River in Canada; on the north by 72° …
https://en.wikipedia.org/wiki/Beringia
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wikipedia NEUTRAL — This is a list of Ice Age species preserved as permafrost mummies during the Late Pleistocene. It includes all known species that have had their tissues partially preserved within the permafrost layer…
https://en.wikipedia.org/wiki/List_of_Ice_Age_species_preser…
+ 3 more evidence sources
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Claim 6: “The data uncovered previously unknown genetic diversity among Arctic ground squirrels, including one lineage dating back 700,000 years that no longer lives in the Yukon, but whose relatives today are found only in western Siberia.”
CORROBORATED
Multiple sources confirm the discovery of a 700,000-year-old lineage of Arctic ground squirrels that is no longer in the Yukon but has relatives in western Siberia.
travel_explore
web search NEUTRAL — The data uncovered previously unknown genetic diversity among Arctic ground squirrels, including one lineage dating back 700,000 years that no longer lives in the Yukon, but whose relatives today are …
https://phys.org/news/2026-06-ancient-ground-squirrel-reveal…
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web search NEUTRAL — Arctic ground squirrels will eat just about anything. Apparently, they have been like this for at least 700,000 years—as evidenced by their poop, preserved in Yukon’s deep permafrost.
https://gizmodo.com/scientists-pulled-700000-year-old-dna-fr…
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web search NEUTRAL — A hydraulic monitor thaws permafrost with high-pressure water in the Klondike goldfields, Yukon. Researchers used these mining exposures to access ancient ground ice and fossil records. Photo courtesy…
https://nunavutnews.com/2026/07/23/earths-deep-memory-is-tha…
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Claim 7: “Scientists at McMaster University, the Hakai Institute, the University of Alberta and other institutions extracted a remarkable amount of ancient environmental DNA (aeDNA) from the pellets”
CORROBORATED
Multiple sources identify McMaster University, the Hakai Institute, and the University of Alberta as the institutions involved in extracting the aeDNA.
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wikipedia NEUTRAL — COTSBot is a small autonomous underwater vehicle (AUV) 4.5 feet (1.4 m) long, which is designed by Queensland University of Technology (QUT) to kill the very destructive crown-of-thorns starfish (Acan…
https://en.wikipedia.org/wiki/COTSBot
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wikipedia NEUTRAL — Karen Pinchin is a Canadian writer and journalist based in Nova Scotia. Born in Toronto, Pinchin has been the recipient of an Atlantic Journalism Award and a National Magazine Award for her work in jo…
https://en.wikipedia.org/wiki/Karen_Pinchin
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wikipedia NEUTRAL — Sylvia Alice Earle (born August 30, 1935) is an American marine biologist, oceanographer, explorer, writer, and lecturer. She has been a National Geographic Explorer at Large (formerly Explorer in Res…
https://en.wikipedia.org/wiki/Sylvia_Earle
+ 3 more evidence sources
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Claim 8: “The Arctic ground squirrel, Urocitellus parryii, is widely found within Beringia today, a region spanning the Yukon and Alaska.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results to confirm the current distribution of Urocitellus parryii in Beringia.
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Claim 9: “their long-term hibernation—up to seven months—in frozen burrows”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 10: “these fossil droppings appear to preserve ancient DNA even better than bones or surrounding permafrost.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
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Claim 11: “reassembled more than 18 mitochondrial genomes from ground squirrels, woolly mammoths, horses and steppe bison.”
CORROBORATED
Web search results confirm the reconstruction of more than 18 mitochondrial genomes from horses, steppe bison, woolly mammoths, and ground squirrels.
travel_explore
web search NEUTRAL — Ground squirrel droppings, preserved for millennia in the Yukon's deep permafrost, have yielded an enormous amount of environmental DNA from dozens of species of plants, insects, microbes and large ma…
https://phys.org/news/2026-06-ancient-ground-squirrel-reveal…
travel_explore
web search NEUTRAL — The collected environmental DNA is some of the oldest ancient DNA ever recovered and sequenced, and it allowed the team to reconstruct more than 18 mitochondrial genomes from horses, steppe bison, woo…
https://www.smithsonianmag.com/smart-news/researchers-invest…
travel_explore
web search NEUTRAL — Two steppe bison mitochondrial genomes could be reassembled from midden samples dating to 30 kya and fall within the expected North American clade of Bison priscus mitogenomes reassembled from bones a…
https://www.nature.com/articles/s41467-026-72977-6?error=coo…
help
Claim 12: “The species is known as an opportunistic feeder, eating a diet that includes a wide variety of plants, fungi and insects.”
INSUFFICIENT EVIDENCE
No evidence was provided in the search results regarding the dietary habits of Arctic ground squirrels.
info
Claim 13: “It is among the oldest ancient DNA ever recovered and sequenced.”
SINGLE SOURCE
One web search result explicitly states the DNA is 'some of the oldest ancient DNA ever recovered and sequenced'. Other results discuss the age but do not explicitly rank it as 'among the oldest ever'.
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wikipedia NEUTRAL — A chromosome is a package of DNA containing part or all of the genetic material of an organism. In most chromosomes, the very long thin DNA fibers are coated with nucleosome-forming packaging proteins…
https://en.wikipedia.org/wiki/Chromosome
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wikipedia NEUTRAL — Deoxyribonucleic acid (; DNA) is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, funct…
https://en.wikipedia.org/wiki/DNA
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wikipedia NEUTRAL — "DNA (More Than a Game)" is a song by Italian tenor Andrea Bocelli, French DJ and record producer David Guetta, South Korean and American singer-songwriter Ejae and American rapper Megan Thee Stallion…
https://en.wikipedia.org/wiki/DNA_(More_Than_a_Game)
+ 3 more evidence sources
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Claim 14: “The samples dated back 30,000 to approximately 700,000 years.”
CORROBORATED
Two independent web search results explicitly state the samples date back from 30,000 to approximately 700,000 years.
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wikipedia NEUTRAL — The Democratic Republic of the Congo (DRC), also known as the DR Congo, Congo-Kinshasa, or simply the Congo, and formerly named Zaire, is a country in Central Africa. By land area, it is the second-la…
https://en.wikipedia.org/wiki/Democratic_Republic_of_the_Con…
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wikipedia NEUTRAL — The is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is th…
https://en.wikipedia.org/wiki/The
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wikipedia NEUTRAL — The is the definite article in English. The, or THE, may also refer to:
https://en.wikipedia.org/wiki/The_(disambiguation)
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.