In an era where conspiracy theories get national attention, disinformation spreads on social media, and some politicians trade on a mythologized version of America’s past, it’s fascinating to look back at a hoax that captured many imaginations at the turn of the 20th century: the Kensington Runestone. The Runestone was “discovered” in 1898 and purportedly told the story of Viking missionaries who traveled to Minnesota in 1362, more than a century before other Europeans reached this continent.