Victor M.

45 days ago

A Child’s Puzzle Has Helped Unlock the Secrets of Magnetism

quantamagazine.org

For a few months in 1880, entire swaths of the United States succumbed to an addiction the likes of which had never been seen. “It has become literally an epidemic all over the country,” wrote The Weekly News-Democrat in Emporia, Kansas, on March 12, 1880.