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.

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.”

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

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.”

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.

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.”