{"id":107995,"date":"2026-11-05T13:00:57","date_gmt":"2026-11-05T13:00:57","guid":{"rendered":"https:\/\/site.itshrt.com\/worldnews\/giant-rat-weighing-66-pounds-once-roamed-thailand-fossilized-teeth-reveal\/"},"modified":"2026-11-05T13:00:57","modified_gmt":"2026-11-05T13:00:57","slug":"giant-rat-weighing-66-pounds-once-roamed-thailand-fossilized-teeth-reveal","status":"publish","type":"post","link":"https:\/\/site.itshrt.com\/worldnews\/giant-rat-weighing-66-pounds-once-roamed-thailand-fossilized-teeth-reveal\/","title":{"rendered":"&#8220;Giant rat&#8221; weighing 66 pounds once roamed Thailand, fossilized teeth reveal"},"content":{"rendered":"<p> <script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6606220950177433\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<!-- ItShrt World News -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-6606220950177433\"\r\n     data-ad-slot=\"1882483372\"\r\n     data-ad-format=\"auto\"\r\n     data-full-width-responsive=\"true\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\r\n<br \/>\n<\/p>\n<div id=\"\">\n<p>A giant rodent weighing around 66 pounds roamed what is now southern Thailand 33 to 35 million years ago, scientists said, after identifying a previously unknown species from two fossilized teeth.<\/p>\n<p> The ancient animal, which one geologist on the team called a &#8220;giant rat,&#8221; was among the largest known from the Paleogene period, offering new clues about how early rodents evolved to enormous sizes.<\/p>\n<p> The findings, <a href=\"https:\/\/www.nature.com\/articles\/s41598-026-76711-6\" target=\"_blank\" rel=\"noopener\">published Wednesday<\/a> in the journal Scientific Reports, were based on a molar and an incisor discovered in 2004 at a coal mine in southern Krabi province.<\/p>\n<p> Pannipa Tian, a geologist with Thailand&#8217;s Department of Mineral Resources, who found the incisor, said she initially misidentified the fossil because of its &#8220;unusually large size.&#8221;<\/p>\n<p> &#8220;At first, I thought it was a bone. I showed it to my supervisor, who told me it was a giant rat&#8217;s tooth,&#8221; Pannipa, 51, told AFP on Thursday.<\/p>\n<p> The cream-colored fossil stood out against the dark coal deposits, while another expedition member found the dark-colored molar the same day.<\/p>\n<p> The Krabi basin has previously yielded fossils of ancient primates, carnivores and hoofed mammals.<\/p>\n<p> But at the time of the discovery, the team lacked sufficient evidence and technology to identify the species.<\/p>\n<p> More than two decades later, researchers from Thailand, France and Canada were able to do so through detailed analysis of the teeth.<\/p>\n<p> The animal weighed around 30 kilograms \u2014 an estimated half as much as a large capybara, the world&#8217;s largest living rodent, they said.<\/p>\n<div class=\"embed__float-wrap\">\n<figure class=\"embed embed--type-image is-image embed--float-none embed--size-medium\" data-ads=\"{\" extrawordcount=\"\">\n<p>      <span class=\"img embed__content \"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/assets1.cbsnewsstatic.com\/hub\/i\/r\/2026\/11\/05\/ea147586-2f1e-415e-b24e-9285ab0e7a89\/thumbnail\/620x393g2\/a650ec052f3c133ce54134f747ffb2e9\/teeth-screenshot-2026-11-05-062208.png#\" alt=\"teeth-screenshot-2026-11-05-062208.png \" height=\"393\" width=\"620\" class=\" lazyload\" srcset=\"https:\/\/assets1.cbsnewsstatic.com\/hub\/i\/r\/2026\/11\/05\/ea147586-2f1e-415e-b24e-9285ab0e7a89\/thumbnail\/620x393g2\/a650ec052f3c133ce54134f747ffb2e9\/teeth-screenshot-2026-11-05-062208.png 1x\" loading=\"lazy\"\/><\/span><figcaption class=\"embed__caption-container\">\n<p>                  <span class=\"embed__caption\">Morphological and size comparisons of the lower molars of Yakamys sirindhornae gen. et sp. nov. from the late Eocene of the Krabi Basin, Thailand, with those of Paleogene ischyromyids of different sizes.<\/span><\/p>\n<p>                  <span class=\"embed__credit\"><\/p>\n<p>                Scientific Reports \/ Chaimanee et al<\/p>\n<p>                          <\/span><br \/>\n              <\/figcaption><\/figure>\n<\/p><\/div>\n<p>Unlike the South American capybara, however, the prehistoric rodent belonged to the now-extinct Ischyromyidae family, one of the earliest major groups of rodents.<\/p>\n<p> &#8220;It tells a lot about the diversity of life in the past,&#8221; Pannipa said, suggesting ancient rodents may have evolved in what is now Thailand before spreading to other parts of the world.<\/p>\n<p> But with only two teeth recovered, the animal&#8217;s appearance, diet and behavior remain unknown.<\/p>\n<p> The species was named Yakamys sirindhornae in honor of Thailand&#8217;s Princess Sirindhorn, a supporter of scientific and paleontological research.<\/p>\n<p>While the new species may seem massive, other discoveries around the world have revealed even bigger rodents. In 2020, scientists announced the discovery of a prehistoric <a href=\"https:\/\/communities.springernature.com\/posts\/giant-extinct-rodent-was-all-brawn-and-little-brain\" target=\"_blank\" rel=\"noopener\">human-sized rat<\/a> that lived in the Amazon rainforest 10 million years ago.<\/p>\n<p>In 2008, Uruguayan scientists said they had uncovered fossil evidence of the <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/giant-rodent-fossil-found-in-uruguay\/\" data-invalid-url-rewritten-http=\"\">biggest species of rodent<\/a><\/span> ever found, a 1-ton creature that scurried across wooded areas of South America about 4 million years ago. <\/p>\n<p>In 2003, researchers said they had\u00a0found fossils for a 1,545-pound <span class=\"link\"><a href=\"https:\/\/www.cbsnews.com\/news\/rat-zilla-the-1500-lb-rodent\/\" data-invalid-url-rewritten-http=\"\">&#8220;Rat-zilla&#8221;<\/a><\/span> that thrived millions of years ago in a swampy South American forest.<\/p>\n<section 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