Comet Madness: How the 1910 Return of Halley’s Comet (Almost) Destroyed Civilization

As the comet neared Earth, scientists and journalists alike scrambled to get the story straight as citizens the world over panicked. Popular astronomer Camille Flammarion attempted to allay fears in a newspaper article, but the media ignored his true position that passage would be harmless; weather prophet Irl Hicks, publisher of an annual, pseudo-scientific almanac, announced that the comet would disrupt the world’s weather; religious leaders thumbed the Bible’s Book of Revelation and wondered if the comet presaged the apocalypse. Newspapers, confident that there was gold in these alternate theories, gave every crackpot a megaphone, increasing circulation and stoking international hysteria.

As a result, workmen shelved their tools, farmers refused to plant crops they would never harvest, and formerly reliable people stopped paying their creditors. More opportunistic citizens opened “comet insurance” plans. 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.