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Mystery Sacrum
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A 3D scan of a pelvic bone. The bone -- roughly 6.5" long and 3" wide -- is a large sacrum found on the central Oregon coast. The sacrum appears to be quite old and larger than any living species that we have been able to compare it to so far. It is probably from an adolescent animal, since the separate bones that make up the whole have not yet fully fused together. Its age is undetermined, but could be 6,000-8,000 years old (based largely on patina and the fact no known terrestrial or marine animals have a sacrum of this size). Specialists are currently leaning toward it being from a marine mammal of some sort, but this is only a guess.
The bone has been slightly modified to appear like an animal's head. Both "eye" sockets have been carved out and a naturally faceted garnet is still embedded in one socket. There is no record of any other bones being found in North America that have gems embedded in them. It is possible this bone figure was created recently (and is essentially a hoax), and we are currently following up on several avenues of research to verify its age and authenticity. 
-> Download the original 3D pelvis object as a PLY file. 
If you don't already have PLY-friendly software to open and view the pelvis object file, download and install MeshLab for Windows for free at http://meshlab.sourceforge.net/