A collection of dinosaur fossils stolen from Mongolia nearly two decades ago has finally made its way back home. Among the 29 recovered fossil sets is a rare and more than half-complete Tarbosaurus bataar, one of the most important predators ever found in the region.
The fossils were taken from Mongolia in 2006 and later surfaced in France, where authorities began a lengthy recovery process. Their return is the result of years of cooperation between French and Mongolian officials working under international cultural heritage protection agreements.
Many of the fossils discovered in Mongolia come from the Gobi Desert, a region that has produced some of paleontology’s most famous finds.
A Decades-Long Fossil Case
The fossils disappeared in 2006 after being removed from Mongolia by smugglers. According to Ulaanbaatar police spokesperson D. Munkhkhuyag, the remains were taken with the goal of generating profit on the black market.
The case remained unresolved until 2013, when French customs officials discovered some of the specimens. As explained by the authorities involved in the recovery effort, that discovery launched a collaboration between France and Mongolia aimed at identifying and returning the fossils.
The process took years. A formal handover ceremony was eventually held in Paris in December 2025, bringing together representatives from both countries. The fossils have since been transferred toMongolia’s National Museum of Natural History in Ulaanbaatar. The collection includes 29 fossil sets that had been outside the country for almost 20 years.
Dinosaurs From The Ancient Gobi Desert
The recovered fossils come from animals that lived around 65 to 70 million years ago during the Late Cretaceous period. As reported by Popular Science, the collection contains remains of theropods, ornithomimosaurs, and hadrosaurs.
These dinosaurs once roamed an environment that looked very different from the Gobi Desert seen today. While the region is now largely dry and cold, it was once a humid landscape marked by forests, floodplains and river systems.
That ancient setting helped support a rich diversity of dinosaur species. Over millions of years, their remains became preserved in sediments that would later make Mongolia one of the world’s most important fossil-producing regions. The fossils returned from France represent a small but valuable part of that prehistoric record.
A Rare Tarbosaurus Returns to Its Homeland
The centerpiece of the collection is amore than 50% complete specimen of Tarbosaurus bataar.Because the species is found almost exclusively in Mongolia and parts of Central Asia, specimens like this are relatively rare and scientifically significant.
Tarbosaurus bataar was the dominant predator of its ecosystem. Adults could grow beyond 33 feet in length, stand nearly 10 feet tall and weigh more than five tons. The carnivore is believed to have preyed on large dinosaurs, includingankylosaurids.
As explained in the same source, during the handover, some paleontologists have suggested that Tarbosaurus bataar shares enough similarities with Tyrannosaurus rex to be considered an Asian representative of the Tyrannosaurus genus. It remains classified as a separate species.
The fossils will now be catalogued and cleaned by museum specialists before being displayed to the public. Museum director Manchuk Nuramkhan described the fossils as “priceless,” form a unique part of Mongolia’s heritage.
“The dinosaur fossil is priceless and a unique piece of heritage.” she added, “We are delighted that children and young people will have the opportunity to see Mongolia’s dinosaur heritage firsthand and learn from it.”
