Time: If you were taking a morning stroll through the British town of Hull over the weekend, you might have been shocked to find a surreal, Smurf-like scene: a crowd of roughly 3,200 completely nude people gathered in the streets, all clustered together and painted bright shades of marine blue.
The art installation was the brainchild of U.S.-based photographer Spencer Tunick, who was asked by a local museum to create one of his iconic large-scale works. Tunick put out a call for volunteers to participate...