The Stone Age burial site held the remains of at least 11 adults and one infant. Curiously, the burial wasn't underground, but rather underwater: During the Stone Age, the skulls would have lain at the bottom of a small lake.
Only one of the people had a jaw, but there were plenty of animal jaws at the site. The archaeologists believe that the manner of burial indicates that a ritual accompanied it, but it's impossible to know exactly what occurred, the researchers said. [Read more about the Stone Age Skulls]
Even so, they were surprised to find the mysterious burial at the archaeological site of Kanaljorden, which dates to between 8,000 to 7,500 years ago, the researchers said.
Bear jaw bone
This skull (pictured here) has well-preserved facial bones, but no jaw.
[Read more about the Stone Age Skulls]