Don't believe your eyes: This year's best illusions

Illusions contest: The steerable spiral

Illusions contest: The fat face thin illusion

Illusions contest: Stretching out in the tub

Illusions contest: Non-glossy gloss

Illusions contest: Six ways to see two curves

Illusions contest: Blurry heart

Illusions contest: Monkey business illusion, take 2

Illusions contest: Illusion-defying contours

Illusions contest: After-image twist

Life

'Impossible motion' trick wins Illusion Contest