Three prehistoric flint arrowheads found in Blätterhöhle cave. Photo from LWL-AfW Olpe / Michael Baales Blätterhöhle cave is in Hagen and a roughly 300-mile drive west from Berlin.

This rib bone discovered in a cave in the Spanish Pyrenees tells a story of Bronze Age violence. But who fired the shot?

To answer these questions, a team of researchers from several German institutions compared bronze and flint arrowheads found in the valley with over 4,000 contemporary examples from across Europe.

Three prehistoric flint arrowheads found in Blätterhöhle cave. Photo from LWL-AfW Olpe / Michael Baales Blätterhöhle cave is in Hagen and a roughly 300-mile drive west from Berlin.