AP Photo

A framed print of "The Garden of Earthly Delights" hangs above the moss-green, L-shaped sectional in John Bargh's office on the third floor of Yale University's Kirtland Hall. Hieronymus Bosch's famous triptych imagines a natural environment that is like ours (water, flowers) yet not (enormous spiked and translucent orbs). What precisely the 15th-century Dutch master had in mind is still a mystery, though theories abound