The World Snake

"Oh, that." I showed it to him. "It just looks like a wedding ring; I wear it to keep women off." That ring is an antique I bought in 1985 from a fellow operative—he had fetched it from pre-Christian Crete. "The Worm Ouroboros...the World Snake that eats its own tail, forever without end. A symbol of the Great Paradox." —Robert A. Heinlein, "All You Zombies—" (1959)