Scientists Unearth Southeast Asia's Largest Dinosaur in Thailand

Researchers have identified and excavated the fossils of Nagatitan chaiyaphumensis, the largest known dinosaur from Southeast Asia, in Thailand's Chaiyaphum province. The discovery, published in Scientific Reports, reveals a Cretaceous Period sauropod that lived approximately 113 million years ago. Estimated to be nearly 27 meters long and weighing between 25 and 28 tons, this plant-eating behemoth was likely immune to predation due to its massive size. The skeletal remains, including a 1.78-meter-long humerus, were initially spotted by a local villager and subsequently excavated by scientists over several years. Although the head and teeth were not recovered, experts believe Nagatitan was a bulk browser feeding on conifers and seed ferns in a subtropical environment. The ecosystem also hosted pterosaurs, crocodiles, and smaller predators like a relative of Carcharodontosaurus. Lead author Thitiwoot Sethapanichsakul noted that while Nagatitan was huge, it was smaller than South American giants like Argentinosaurus. This finding significantly enhances understanding of dinosaur diversity and ecosystem dynamics in ancient Southeast Asia.