Could a mysterious slab of stone near Kensington, Minnesota hold the key to a forgotten piece of ancient history? According to the true believers, this stone, discovered in the late 1800s, proves that Vikings made it deep into the interior of North America in the 1300s -- only to disappear soon afterward, leaving no trace but a grisly story carved in runes upon the stone. Tune in to learn more.

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Source: Stuff They Don't Want You To Know