In November 1934 a team of American baseball stars, including Babe Ruth, toured Japan. When they arrived for a game in the town of Narashino, each man was presented with a horseshoe-shaped flower wreath. Ruth detested the gift; he later told a Japanese baseball magazine that he considered such wreaths bad luck and had never hit a home run after receiving one.

In July 2003 details leaked of a new venture from the Defense Advanced Research Projects Agency: an online market for financial speculation on possible terrorist attacks, assassinations, and coups. “Futures markets have proven themselves to be good at predicting such things as elections results,” the Defense Department argued. “They are often better than expert opinions.” DARPA—already under fire for its proposed Total Information Awareness program—was forced to abandon the idea.

“The contempt of risk and the presumptuous hope of success are in no period of life more active than at the age at which young people choose their professions,” wrote Adam Smith in 1776. “How little the fear of misfortune is then capable of balancing the hope of good luck.”

Archaeologists found in a Utah cave as many as seventeen thousand carved sticks, canes, and bone pieces—gambling items used in the thirteenth century by ancestors of the Apache and Navajo. “Seventy to eighty percent of dice games were for women only,” one researcher said about the find, which may have been America’s first casino. “So what do we have here? Women who knew the games of other women.”

Thomas Jefferson never wrote or said, “I’m a great believer in luck. The harder I work the more I seem to have.” The quip was crafted by San Francisco humorist Coleman Cox for a 1922 collection titled Listen to This.

It’s considered bad luck in parts of Mississippi for mourners to call a coffin pretty.