8,000-Year-Old Heads on Stakes Found in Mysterious Underwater Grave

None of the human skulls had jaw bones. There was one human jaw bone at the site, but it wasn't associated with any of the skulls.

The discovery of a burial containing 8,000-year-old battered human skulls, including two that still have pointed wooden stakes through them, has left archaeologists baffled, according to a new study from Sweden.

It's hard to make heads or tails of the finding: During the Stone Age, the grave would have sat at the bottom of a small lake, meaning that the skulls would have been placed underwater. Moreover, of the remains of at least 11 adults placed on top of the grave, only one had a jawbone, the researchers said.

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