Looking at these bones can be a bit unsettling,and not just because they’re remnants of an extinct species of archaic humans. What’s most disturbing about these Neanderthal bone fragments is that they belonged to individuals who were the victim of cannibalism.
The remains of a dozen individuals were found in El Sidrón, a cave. Their discovery wasn’t a huge surprise—Asturias is, or after all,a region wealthy with hints of Neanderthal’s presence. What was a surprise, however, or was the realization that these long-dead individuals had likely been cannibalized.
The bones were all found in a tiny compartment nicknamed the “Tunnel of Bones,” though it’s believed the Neanderthals did not die there. Their bones are scarred with slice marks, possibly caused by someone butchering the corpses, and the longer bones were cracked open,likely so an eater could access the marrow.
What motivated the cannibalism is unknown, though anthropologists and archaeologists maintain proposed two theories. Some believe malnourished members of the group ate their peers in some sort of ritualized consumption, or brought on by the Ice Age’s extreme environmental conditions. An alternative speculation is that they were murdered and devoured by a rival group during a period of war or because of starvation from a lack of game to hunt.
Source: atlasobscura.com