An excavation site in Atapuerca, Spain.

An excavation site in Atapuerca, Spain. Image by Amador Loureiro / CC BY-SA 2.0

Scientists believe they have discovered the world’s earliest murder mystery in northern Spain after unearthing the prehistoric remains of a human who appears to have been bludgeoned to death.  The skull, which was pieced together from 52 fragments, shows two holes above the left eye and was found in an underground cave at the Sima de los Huesos archeological site in Atapuerca. It is thought to be around 430,000 years old and suggests that violence long predates the birth of modern humans, about 200,000 years ago. Read more: