German museum to return rare Irritator dinosaur skull to Brazil

Spinosaurid fossil bought by Stuttgart institution in 1991 has been the subject of a long restitution campaign

It is a 113-million-year-old bone of contention.

After Stuttgart's museum of natural history bought a fossilised dinosaur skull in 1991, researchers found it was the most complete spinosaurid skull known to date, belonging to a previously unknown genus of the huge meat-eating dinosaurs.