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Minnesota Authorities say kayakers stumbled upon a nearly 8,000-year-old human skull in a river.

The Renville County Sheriff’s Office said on Wednesday that two kayakers made the bone-chilling discovery in September 2021, according to FOX 9. It was determined by both the Midwest Medical Examiner’s Office and the FBI’s forensic anthropologist that the bone belonged to a young adult man, adding that it may have suffered blunt force trauma due to a depressed area on the skull.

Minnesota authorities say kayakers stumbled upon a nearly 8,000-year-old human skull in a river.

Minnesota authorities say kayakers stumbled upon a nearly 8,000-year-old human skull in a river.
(Renville County Sheriff’s Office)

Officials used carbon-14 analysis and determined that the man was alive sometime between 5,500-6,000 BCE, nearly 8,000 years ago.

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Carbon-14 from the atmosphere via food is incorporated into bones while the bones are maturing. Through reviewing the Carbon-14, this individual would have had a heavy marine diet or a diet high in maize, pearl millet, or sorghum, which is outside the range of the American diet, “the sheriff’s office said.

Minnesota police say kayakers stumbled upon a nearly 8,000-year-old human skull in a river.

Minnesota police say kayakers stumbled upon a nearly 8,000-year-old human skull in a river.
(Renville County Sheriff’s Office)

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The sheriff’s office said it was “incredible” that the determination was made using science and technology.