Scientists have identified a new species of giant, long-necked dinosaur, based on fossils discovered in the country's northeast, the BBC reports.
Called "Nagatitan chaiyaphumensis," this dinosaur is considered the largest ever found in Southeast Asia.
It weighs about 27 tons — as much as nine full-grown Asian elephants — and reaches a length of 27 meters (about the same as the length of a blue whale).
It belongs to the sauropod family, long-necked herbivorous dinosaurs.
The species was identified by a team of researchers from University College London and Thai universities after analyzing fossils found near a pond in Chaiyaphum province about a decade ago.
According to researchers, the discovery helps to better understand how climate changes in ancient times created conditions for the development of giant dinosaurs.
The name "Nagatitan" comes from "naga", a mythological serpent in Southeast Asian folklore, and "titan", referring to the deities of Greek mythology.
This species lived about 100 to 120 million years ago, approximately 40 million years before Tyrannosaurus rex, and was about twice as large as it.
The study's lead author, Thitiwoot Sethapanichsakul, said the team calls this species Thailand's "last titan" because the fossils were found in the country's youngest rock formation where dinosaurs have been discovered.
He explained that the region's younger geological layers, formed at the end of the dinosaur era, likely contain no other remains, as the area had become a shallow sea.
The study was published in the scientific journal "Scientific Reports".
Paleontologist Sita Manitkoon said Thailand has a great variety of fossils and may be the third country in Asia in terms of the number of dinosaur remains discovered.
According to the co-authors, Nagatitan lived during a period when carbon dioxide levels in the atmosphere were rising, while global temperatures were high — an environment that may have influenced the development of vegetation, the main food for these giant herbivores.