Medieval grave reveals rare 'coffin birth' and neurosurgery - CNN

CNN

Medieval grave reveals rare 'coffin birth' and neurosurgery CNN This portion of a whale skull was found at the Calaveras Dam construction site in California, along with at least 19 others. Some of the pieces measure 3 feet long. Hide Caption. 1 of 29. A Stone Age cow skull shows trepanation, a hole in the cranium ... and more »

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