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Ancient giant rodent discovered in southern Thailand coal deposits

Paleontologists have identified fossils of a massive rodent species that roamed present-day southern Thailand approximately 34-35 million years ago. The remarkable discovery, based on dental remains excavated from a coal mine in Krabi Province, reveals an extinct creature weighing around 30 kilograms.

LSN Vietnam · 7 November 2026

Ancient giant rodent discovered in southern Thailand coal deposits

An international research team has uncovered evidence of a previously unknown giant rodent species that inhabited what is now southern Thailand during the Oligocene epoch. Analysis of fossilized teeth extracted from coal mining operations in Krabi Province indicates the creature lived between 34 and 35 million years ago.

The dental fossils provide critical insights into the animal's size, diet, and evolutionary characteristics. At approximately 30 kilograms, the rodent would have been substantially larger than modern rodent species, representing a significant discovery for understanding prehistoric mammalian fauna in Southeast Asia.

The excavation at the Krabi coal mine has proven to be a valuable paleontological site, yielding well-preserved specimens that offer researchers rare glimpses into the region's ancient ecosystem. The findings contribute to ongoing efforts to map the biodiversity and environmental conditions of Southeast Asia during the Oligocene period, a critical era in mammalian evolution.

The discovery underscores Thailand's importance as a repository of paleontological treasures and highlights the potential for further significant findings within the country's coal deposits and other geological formations. Continued excavation and analysis of these sites may reveal additional information about the extinct megafauna that once thrived in the region.