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Wild boar in southeastern Germany have long contained high levels of radioactive substances, which has been attributed to the 1986 Chernobyl nuclear disaster. But as radioactivity levels have fallen in other animals, they have stayed much the same among boar. Now, scientists have worked out the secret behind the so-called “wild boar paradox”. Research shows there is another culprit for the high levels of radioactivity: nuclear weapons tests from the mid-20th century. And both the weapons and the nuclear reactor meltdown continue contaminating the boar because of their diet. While the muscular boar seem healthy, the dangerous levels of radioactive caesium, the main contaminator, have prompted people to stop hunting them. In turn, there is now an overpopulation issue. “Our work reveals deeper insights into the notorious radio-cesium contamination in Bavarian wild boars beyond the total radionuclide quantification only,” radioecologist Felix Stäger from Leibniz University Hannover wrote in a paper. After a nuclear incident, radioactive materials can pose a significant threat to ecosystems. This happened after the Chernobyl meltdown in 1986, where there was an increase in radioactive caesium contamination. The main component of this, caesium-137, has a half-life of about 30 years, meaning it loses its radioactivity fairly quickly. However, caesium-135, which is created via nuclear fission, is far more stable. It has a half-life of more than 2m years. The ratio of cesium-135 compared to cesium-137 can help us work out where the cesium came from. A high ratio indicates nuclear weapon explosions, while a low ratio points to nuclear reactors like Chernobyl. So the researchers analysed caesium levels from 48 wild boar meat samples from 11 regions of Bavaria. It turns out that nuclear weapons testing was responsible for between 12 per cent and 68 per cent of the unsafe contamination in the samples. “All samples exhibit signatures of mixing,” wrote the researchers. “Nuclear weapons fallout and [Chernobyl] have mixed in the Bavarian soil, the release maxima of which were about 20−30 years apart.” So while Chernobyl remains the main source of caesium in wild boar, about a quarter of the samples showed enough contributions from weapons fallout to exceed safety limits even before the reactor meltdown comes into account. And because wild boar eat so many truffles, it has been exacerbated. The fungus absorbs high levels of contamination from both sources. Wild boars' diets, which include underground truffles, have absorbed varying levels of contamination from both sources, which has contributed to the animals' persistent radioactivity. “This study illustrates that strategic decisions to conduct atmospheric nuclear tests 60−80 years ago still impact remote natural environments, wildlife, and a human food source today,” the authors concluded. The study was published in Environmental Science & Technology. Sign up to our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

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Ukraine have claimed that the commander of Russia’s Black Sea fleet, Admiral Viktor Sokolov, was killed in the missile strike on Sevastopol on Friday. The Ukrainian Special Operations Forces said in a social media update on Monday that he was among the 34 killed during the missile strike of the Black Sea fleet headquarters. They also claimed that 105 other occupiers were injured. The Russian defence ministry initially said that Friday’s strike killed one service member at the Black Sea Fleet headquarters, but later issued a statement that he was missing. They have not yet commented on the latest claims. Kyiv launched the missile attack on the fleet based in the port city of Sevastopol in occupied Crimea on Friday morning. Ukrainian officials said the attack, targeting what is believed to be the best of Russia’s navy, was timed to coincide with the naval commanders’ meeting. On Saturday morning, it followed this up with another missile attack on Sevastopol, according to a local Russian-installed official. The strike sent plumes of black smoke billowing from the building. The special forces added that: “The headquarters are beyond repair.” Read More Putin’s Black Sea fleet commander ‘killed in navy attack’ as Ukraine breakthrough triggers ‘panic’ Tucker Carlson denies rumour he is launching Russian TV show after his image appeared on state channel Canadian parliament accidentally honours Nazi - with Zelensky and Trudeau applauding How Ukraine’s forces have surged back against Russia

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