Since the dawn of civilization, humans had believed comets were evil portents. In 1705, Edmond Halley liberated humanity from these primordial superstitions, proving that Newtonian mechanics rather than the will of the gods brought comets into our celestial neighborhood. Despite this scientific advance, when Halley's Comet returned in 1910, newspapers gleefully provoked a global hysteria that unfolded with tragic consequences.In Comet Madness, author and historian Richard J. Goodrich examines the 1910 appearance of Halley's Comet and the ensuing frenzy sparked by media manipulation, bogus science, and outright deception.As the comet neared Earth, scientists and journalists alike scrambled to get the story straight as citizens the world over panicked.As a result, workmen shelved their tools, farmers refused to plant crops they would never harvest, and formerly reliable people stopped paying their creditors. Others suffered mental breakdowns, and some took their own lives.Comet Madness reveals how humans confront the unknown, how scientists learn about the world we inhabit, and how certain people-from outright hucksters to opportunistic journalists-harness fear to produce a profit.