{"id":280521,"date":"2025-10-05T23:41:13","date_gmt":"2025-10-05T23:41:13","guid":{"rendered":"https:\/\/www.europesays.com\/us\/280521\/"},"modified":"2025-10-05T23:41:13","modified_gmt":"2025-10-05T23:41:13","slug":"these-chernobyl-dogs-are-different-researchers-just-uncovered-something-unexpected","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/280521\/","title":{"rendered":"These Chernobyl dogs are different \u2014 researchers just uncovered something unexpected"},"content":{"rendered":"

Nearly four decades after the Chernobyl disaster, scientists are still trying to unravel its long-term effects \u2014 not just on people, but on animals too.<\/strong><\/p>\n

Now, a new genetic study on local dogs has revealed something surprising: they\u2019ve changed, but not in the way researchers expected.<\/p>\n

Two populations of dogs living just 10 miles apart \u2014 one inside the nuclear exclusion zone and the other in a nearby town \u2014 are genetically distinct. That might seem logical at first. After all, one group lives where radiation levels were once off the charts. But scientists from North Carolina State and Columbia University say the differences aren\u2019t likely due to radiation<\/a><\/strong> at all.<\/p>\n

When genomes defy expectations<\/p>\n

In earlier work, researchers found nearly 400 genetic regions that varied between the two dog populations, clearly marking them as different groups. This time, they wanted to go deeper \u2014 right down to the DNA<\/strong>.<\/p>\n

In a paper published in PLOS ONE, the team explored whether years of low-dose exposure to environmental toxins \u2014 like radiation or lead<\/strong> \u2014 could explain the genetic divide. They focused on reproductive mutations passed from parents to offspring, zooming in from chromosome-level changes to the very building blocks of the genome.<\/p>\n

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Two groups of dogs survived highly contaminated environments. Read what researchers discovered about \u2018Chornobyl Dogs.\u2019 (#ColumbiaEHS<\/a>)
\u27a1\ufe0fhttps:\/\/t.co\/mJ0QgB5pll<\/a> pic.twitter.com\/iZKXA3wfYS<\/a><\/p>\n

\u2014 ColumbiaPublicHealth (@ColumbiaMSPH) March 9, 2023<\/a><\/p><\/blockquote>\n

To their surprise, they found no evidence of radiation-induced genetic shifts. \u201cWe know that high doses of radiation can disrupt chromosomes,\u201d said geneticist Matthew Breen. \u201cAnd even after 30 generations, we\u2019d expect to see signs of that if it had helped the dogs survive. But we didn\u2019t find any.\u201d<\/p>\n

Evolution by survival, not radiation<\/p>\n

So, what\u2019s going on? One possibility, according to lead author Megan Dillon, is that dogs<\/strong><\/a> that managed to survive and reproduce already carried traits that made them hardier. \u201cThere might have been extreme selective pressure early on,\u201d she explained, \u201cand the dogs near the nuclear plant may have simply stayed isolated from the city population.\u201d<\/p>\n

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New study examines the genetics of dogs near Chornobyl, offering insights into health risks from long-term toxin exposure after the disaster. Radiation isn\u2019t the cause, but other environmental toxins might be. #ColumbiaEHS<\/a>https:\/\/t.co\/uRZeRrbYQc<\/a><\/p>\n

\u2014 ColumbiaPublicHealth (@ColumbiaMSPH) January 14, 2025<\/a><\/p><\/blockquote>\n

More research is underway to explore that idea. But scientists say one thing is already clear: these animals offer rare insight into how ecosystems \u2014 and living creatures \u2014 respond to disaster.<\/p>\n

Why this matters beyond Chernobyl<\/p>\n

The findings go far beyond curious canine genetics. As the researchers point out, major industrial disasters aren\u2019t behind us \u2014 they\u2019re likely ahead of us. And to protect both humans and animals, we need to better understand how long-term, low-level environmental exposures shape health and survival<\/a><\/strong>.<\/p>\n

\u201cThe rise of technology and industrialization means we\u2019ll see more events like Chernobyl,\u201d the authors conclude. \u201cAnd we have to be ready \u2014 with better science, better data, and better protection.\u201d<\/p>\n

\"mayer-nathalie\" <\/p>\n

\t\t\t Nathalie Mayer <\/p>\n

\n Journalist <\/p>\n

Born in Lorraine on a freezing winter night, storytelling has always inspired me, first through my grandmother’s tales and later Stephen King’s imagination. A physicist turned science communicator, I’ve collaborated with institutions like CEA, Total, Engie, and Futura. Today, I focus on unraveling Earth’s complex environmental and energy challenges, blending science with storytelling to illuminate solutions.<\/p>\n

\"author-fs\" <\/p>\n

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