Inside a small museum of turn-of-the-century electrical oddities in West Palm Beach, Florida is a small shattered glass photographic negative. It's the only surviving evidence of a strange machine that harnessed an unknown power source to potentially replace steam and electricity. What's the real story behind this motor? Among the classic cars and historic automobiles at the Henry Ford Museum in Dearborn, Michigan is a specially modified Lincoln Continental limousine. What role did this armored vehicle play in one of the most perilous moments in the life of a new president? The Ewell Sale Stewart Library in Philadelphia, Pennsylvania contains one oversized book that catalogues every bird species in America in vivid, full-color detail. But the book, a masterpiece by a famous American artist, depicts some birds that do not exist. What is the explanation for these mystery birds?

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