A 113-million-year-old bone of contention will soon return to its country of origin. A rare Irritator dinosaur skull. Housed in a German museum since 1991, is set to be repatriated to Brazil after years of scientific and legal scrutiny — the fossil, identified as the most complete spinosaurid skull known to date, was discovered to belong to a previously unknown genus of meat-eating dinosaurs.

A Unique Dinosaur with a Curious Name

In 1996. Paleontologists named the genus Irritator, a nod to the frustration they felt when they discovered the snout had been altered; the species was named challengeri after Professor Challenger from Arthur Conan Doyle’s novel The Lost World. This rare 113-million-year-old fossil became a major scientific discovery in the 1990s.

However, as more studies were published, Brazilian experts began to express concerns over the legal and ethical status of the fossil; Brazil passed a law in 1942 stating that fossils found in the country belong to the state. Since 1990. Exporting fossils requires a permit and a partnership with a Brazilian scientific institution; no one is certain when the Irritator was unearthed or when it left Brazil, complicating its legal status.

Global Efforts for Fossil Repatriation

In recent years, a campaign was launched to repatriate the Irritator fossil. An open letter calling for the skull’s return was signed by 263 experts from around the world, and more than 34,000 members of the public signed an online petition. Brazilian paleontologist Prof Aline Ghilardi, who participated in the campaign, said the public’s support was decisive.

“Its return is an important and positive step, and I hope that the process moves forward swiftly,” she said — she added that the fossil holds deep scientific, cultural, and symbolic importance for Brazil. Prof Allysson Pontes Pinheiro of Cariri regional university echoed this sentiment, calling the repatriation a sign of progress toward a more ethical and less colonial approach to science.

“This fossil will be widely celebrated and adds to recent returns of fossil material from France, the United Kingdom, Italy, and the United States,” he said. He noted that this case could set an important precedent for how museums and research institutions handle fossil material with contested origins.

Challenges and Opportunities in Fossil Repatriation

Despite the progress, some experts expressed disappointment that the joint declaration from Germany and Brazil said the fossil will be “handed over” rather than explicitly repatriated. Ghilardi noted this was a missed opportunity to address the issue more clearly in terms of restitution. Paul Stewens, a legal researcher at Maastricht University who helped organize the open letter, criticized the practice of removing fossils from their country of origin without involving local scientists or institutions.

“The research, output, and museum income related to these specimens don’t stay in the country of origin,” he said. He emphasized that fossils are part of the heritage that connects people to where they are from. In 2023, another fossil, initially named Ubirajara, was returned to Brazil after a long campaign. Dr Emma Dunne of Trinity College Dublin, who helped draft the Irritator letter, said there are “many more specimens that should return home, following in the pawprints of Ubirajara and Irritator.”

David Martill, an emeritus professor at the University of Portsmouth, welcomed the return of the Irritator fossil but expressed disappointment that some Brazilians had turned the issue into a political debate. He noted that many Brazilian specimens are in other countries, notably the US. Martill, who has studied the Irritator skull, added that he hopes Brazil will preserve it well, as it took significant time and effort to prepare and study the specimen.

Stewens said he believed the diplomatic efforts involved in this case could lead to new collaborative approaches, such as programs that allow Brazilian scientists to study fossils in Germany. “I think the trailblazing element of this restitution is the cooperation between the governments,” he said. “It shows that there is a lot of space for non-zero-sum solutions.”