SA Special Editions

The brain, like nature, abhors a vacuum

When your eyes scan a room, why doesn't the world appear to bounce like the real image on your retina?

A tale of binocular rivalry

We have eyes, yet we do not see

Camouflage in fish and other animals provides insights into visual perception

Studies of perception show the importance of being upright

2-D or not 2-D, that is the question: test yourself to learn what shapes formed by shading reveal about the brain

Why it's not so cut-and-dried

How the brain sees through the perceptual hurdles of tinted glass, shadows and all things transparent

How can an imaginary square look more real than a box with actual lines?

Even when we consciously know two lines are the same length, why can't we help seeing them as different?

When you hoist two items of equal weight, your brain may be doing some heavy lifting

How the eyes can see movement where it does not exist

What uncertainty tells us about the brain

Startling deceptions demonstrate how tactile information is processed in the brain

The feeling of being touched on a fake hand illuminates how the brain makes assumptions about the world

Reflections on the familiar and yet deeply enigmatic nature of the looking glass

How does the brain sort out contradictory images?

How visual-processing systems shape our feelings about what we see

What do the Mona Lisa and Abraham Lincoln have in common?

Novel illusions suggest that the brain does not separate perception of color from perception of form and depth