On Friday, January 13, 1882, thirteen men met in New York City as the Thirteen Club; they walked under a ladder, ate lobster salad sculpted into the shape of a coffin, and sat beneath a banner reading morituri te salutamus (“we who are about to die salute you”). The following year, the club’s newsletter gleefully reported that “not a single member is dead.” 

Suetonius reported that Caligula often cheated when playing dice. The emperor once interrupted a game to go into the courtyard, where he spotted a group of rich knights passing. He had them arrested, stole their goods, then “resumed the game in high spirits, boasting that his luck had never been better.”

Legend regarding the horseshoe as a lucky symbol holds that in the tenth century, while St. Dunstan was working in England as a farrier, the devil entered the forge and demanded his hooves be reshod. During the process, the future saint caused as much pain as he could, and the devil begged him to stop. Dunstan agreed—on the condition that Satan never enter a house where a horseshoe is on display.

A 2011 study found that Chinese consumers are charged more due to “superstitious manipulations” of retail prices—fives and sixes appear more often than unlucky fours, eights and nines more than unlucky sevens. “Retailers,” the study reported, “are the clear winners.”

“The worst punishment God can devise for this sinner,” wrote Harper Lee—who loved casino gambling—in a 1990 letter, “is to make her spirit reside eternally at the Trump Taj Mahal in Atlantic City.”

When Booker T. Washington and Austrian ambassador Ladislaus Hengelmüller visited the White House on the same day in November 1905, Hengelmüller took Washington’s overcoat by mistake. According to the Washington Post, he noticed the mix-up on finding in the pocket “the left hind foot of a graveyard rabbit, killed in the dark of the moon,” which he “heroically relinquished.”

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.

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.

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.”

A young nobleman in ancient Athens fell in love with a statue of Agathe Tyche, goddess of good fortune. He hugged and kissed it, then offered the local council a large sum of money to purchase it. When his request was denied, he decorated the statue extravagantly with crowns and garlands, offered a sacrifice, uttered a lengthy lamentation, and killed himself.

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.

Sailors’ fear of bananas may extend back to seventeenth-century Spanish ships trading in the Caribbean. Crew members would often purchase wooden crates of the fruit, and when their vessels sailed north to pick up the Gulf Stream in the Straits of Florida, hazards of the passage shipwrecked many, leaving behind stray clumps of bananas floating ominously on the water’s surface for later ships to see.

In Serbian oral tradition, fate often appears written on foreheads. A typical story tells of a man on the run from a plague personified as a woman. “It is not fated that I should kill you,” she says on catching him and seeing his forehead’s inscription. “You’ll be killed by a turtle.” Later, the man mows a field. His scythe hits a turtle, ricochets off its shell, and slices his leg. He dies soon after from blood poisoning.

“Among the greatest pieces of luck for high achievement is ordeal,” poet John Berryman told an interviewer in 1970, two years before his death. “Certain great artists can make out without it, Titian and others, but mostly you need ordeal. My idea is this: the artist is extremely lucky who is presented with the worst possible ordeal which will not actually kill him. At that point, he’s in business.”

When Apple released its Shuffle feature for iPods, users were deceived by the true randomness of its playback; songs from the same album or artist were often grouped by chance. Complaints led Steve Jobs to alter the device’s programming and begin offering Smart Shuffle, which allowed users to adjust the likelihood of hearing similar songs in a row. “We’re making it less random,” he said, “to make it feel more random.”