Meet “The Last Titan,” Southeast Asia’s Most Massive Dinosaur

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Meet “The Last Titan,” Southeast Asia’s Most Massive Dinosaur

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About 100 million years ago, a long-necked giant roamed the warm, subtropical grasslands of prehistoric Thailand – and it may have been the last of its kind. An international team of paleontologists recently described the new sauropod species Scientific reportsand it is the largest dinosaur ever discovered in Southeast Asia.

They named the giant Nagatitan chaiyaphumensis, after the half-human aquatic serpents of Asian folklore (naga), the Greek Titans, and the province of Thailand where it was found (Chaiyaphum). Weighing 60,000 pounds, this nearly 90-foot-long colossus towered over the predators that lived alongside it, like the toothy spinosaurs that lurked in the many rivers that flowed through Thailand during the Cretaceous.

**COLOSSUS:** A size comparison of Nagatitan chaiyaphumensis and a human. The bones in yellow were those unearthed by paleontologists, including a femur nearly six feet long. *Image by Sethapanichsakul, T. et al.* Scientific reports (2026). *Credit: Sethapanichsakul, T. et al Scientific Reports (2026).*

While Nagatitan was the largest dinosaur discovered in Southeast Asia so far, it was dwarfed by other massive sauropods living around the same time, on the other side of the world. Case in point: South America’s Patagotitan and Argentinosaurus, two of the largest land animals to ever walk the Earth’s surface, both weighed more than twice the weight of Nagatitan.

Read more: “What Megalodons Tell Us About Gigantism”

This era in Earth’s history was particularly favorable to the evolution of these heavy leviathans. Lush forests covered the globe, providing plentiful treetops for food, and the abundance of carbon dioxide was turning the planet into a greenhouse, with temperatures ranging from 9 to 18 degrees Fahrenheit warmer than today. Sauropods’ long necks and tails gave them more surface area to dissipate heat and better regulate their internal thermostats. But in Thailand, rising oceans would soon claim Nagatitan’s ancestral lands.

“We call Nagatitan ‘the last titan’ of Thailand. This is because it was discovered in the youngest dinosaur-bearing rock formation in Thailand,” study author Thitiwoot Sethapanichsakul explained in a statement. “The younger rocks deposited near the end of the dinosaur age are unlikely to contain dinosaur remains, because the area had become a shallow sea by then. So they may be the last or youngest large sauropod we will find in Southeast Asia.”

When it comes to climate change, there is no such thing as “too big to fail.”