"Each time you think you are unveiling the truth, all you get is a teasing glimpse of what turns out to be yet another veil," wrote Vilayanur S. Ramachandran and Diane Rogers-Ramachandran in their February/March Illusions column ["Stability of the Visual World"]. Their words eloquently capture the stubborn persistence of researchers as they grapple with seemingly impenetrable mysteries of the mind.