MINNEAPOLIS (AP) - The human skull found in a Minneapolis park earlier this month was likely a discarded teaching tool used at the Minneapolis VA Medical Center.

An investigator from the medical examiner office's told the Star Tribune that the skull is at least 100 years old and is probably one of many human bones left in the area when real bones were used in teaching. About half a dozen bones are found in the area each year.

The skull is believed to belong to a 30- to 45-year old man of European and African descent. It had two holes drilled into it. Many bones found in the area have similar marks because they've been used for teaching.

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