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Why Did These Vikings' Bones Appear Older Than They Are?

Clip: Season 46 Episode 10 | 2m 18s

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Archaeologists discovered a mass grave of what they thought to be ninth-century Vikings. But for some reason, the radiocarbon dates of their bones, found by measuring a radioactive carbon isotope, appeared much older.

Aired: 05/22/19 | Rating: NR

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