The Remarkable Cannibalized Neanderthals

The Remarkable Cannibalized Neanderthals
Posted on: July 28th, 2023

In 1994, an astonishing discovery was made deep within the El Sidron cave system in northern Spain: the remains of 13 Neanderthals who lived approximately 50,000 years ago. Modern forensic analysis revealed a disturbing truth – these Neanderthals had fallen victim to cannibalism. Evidence suggested their skulls had been cracked open to access the nutrient-rich bone marrow. It also appeared that their tongues and brains had also been consumed. The group consisted of a family unit, including seven adults, three teenagers, and three children.

The El Sidron cave system stretches an impressive 12,000 feet, featuring a central gallery approximately 600 feet long. During prehistoric times, this would have served as an excellent shelter. Interestingly, when the remains were first uncovered in 1994, they were mistakenly believed to belong to Spanish Civil War soldiers. This misunderstanding arose from the fact that during the war, the cave had been used as a hideout by Republican soldiers.


Later analysis revealed they were much older.

After it was determined that the bones discovered in the El Sidron cave system were over 50,000 years old, a more detailed investigation was initiated. From 2000 to 2013, the cave underwent extensive excavation. All the bones were found in a single location within the cave known as the Ossuary Gallery, also referred to as the Tunnel of Bones.

Unusual patterns in the bones indicated a high probability of inbreeding, suggesting that the local Neanderthal population was quite small. Given that Neanderthals disappeared from the fossil record approximately 40,000 years ago, this group could provide crucial insights into their eventual extinction. The theory is that Neanderthal communities gradually fragmented into smaller groups, restricting opportunities for diverse mating. This would lead to significant inbreeding, precipitating a range of disorders that weakened the species and ultimately contributed to their downfall.

Interestingly, the males within this group were all related, but the women seemed to have originated from outside the group. This implies that they weren’t entirely isolated from other groups in the region. However, the pervasive evidence of inbreeding found in the DNA of all individuals suggests that such practices had become commonplace during this time period.

Evidence of Neanderthals cannibalism

The nature of the cut marks and pitting, along with the cracked open bones, indicate that other Neanderthals were likely responsible for these acts. There were no signs of scratches or claw marks typically inflicted by predators. The broken bones suggest a clear intent to extract the marrow within. It was also determined that the individuals suffered from malnutrition, their diet largely composed of plants, nuts, and limited meat, lending credence to the theory that they may have been cannibalized by other individuals for survival.

With over 2,500 bones unearthed, the El Sidron site boasts the most extensive collection of Neanderthal fossils in Europe. While the active excavation phase has concluded, ongoing studies continue to analyze the bones and artifacts discovered within the cave.

Bones with congenital anomalies within the El Sidrón family group. Maxilla (A), first cervical vertebrae (B,C), second cervical vertebra (D), twelfth thoracic vertebra (E), twelfth hypoplastic rib or lumbar rib (F), os Centrale and bipartite scaphoid (G), tripartite patella (H), navicular-cuboid non-osseous coalition (I), left foot anomaly (J). Courtesy:


The El Sidron cave system is a significant archaeological site located in the northern region of Spain, particularly known for its extensive collection of Neanderthal remains. Its importance cannot be overstated in understanding the lives, behaviors, and eventual extinction of Neanderthals, one of our closest extinct human relatives.

The cave system itself is expansive, extending for approximately 12,000 feet. It features a central gallery that is about 600 feet long, which would have made an ideal shelter during prehistoric times. The cave’s structure and geography likely provided a safe and sheltered environment for the Neanderthal groups who lived there tens of thousands of years ago.

The El Sidron cave is particularly famous for the discovery in 1994 of remains from a group of Neanderthals who lived around 50,000 years ago. This discovery has provided an invaluable window into Neanderthal life and behavior. The bones were found in a section of the cave known as the Ossuary Gallery or Tunnel of Bones, and subsequent investigations and excavations from 2000 to 2013 have revealed more than 2,500 bones, making it the largest collection of Neanderthal fossils in Europe.

In addition to the Neanderthal remains, the El Sidron cave has also yielded an array of artifacts that offer further insights into Neanderthal culture and lifestyle. These include stone tools and remnants of meals, providing clues to their diet and survival strategies.

Importantly, the findings at El Sidron have also given researchers insight into the social structure of Neanderthal groups, their dietary habits, and evidence of inbreeding, which may have contributed to their eventual extinction.

While the active excavation phase at El Sidron has concluded, research and study of the artifacts and bones continue, potentially offering even more insights into the lives of Neanderthals in the future.

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