"Tomb of the Otters" Filled With Stone Age Human Bones

Thousands of human bones have been found inside a Stone Age tomb on a northern Scottish island, archaeologists say.

The 5,000-year-old burial site, on South Ronaldsay (map) in the Orkney Islands, was accidentally uncovered after a homeowner had leveled a mound in his yard to improve his ocean view. (See Scotland pictures.)

Authorities were alerted to the find in 2010 after a subsequent resident, Hamish Mowatt, guessed at the site's significance.

Mowatt had lowered a camera between the tomb's ceiling of stone slabs and was confronted by a prehistoric skull atop a muddy tangle of bones.

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