Throw your brain a curve. Is it a frog in a pond--or a horse in its stable? Compiled by a neuroscientist who is one of the world's leading authorities on illusions, this calendar features a year of full-color images that play tricks on the eye and mind, and kindle a heightened sense of wonder. Straight lines that bow and distort. Patterns that seem to shimmer. Architectural marvels possible only in a painting. And a Picasso-esque sculpture that, in the mirror, reflects a perfect piano. Each painting, drawing, photograph, and sculpture is an astonishing fusion of science, art, and whimsy.