Add Yahoo as a preferred source to see more of our stories on Google. Discover why hills look steeper than they are and how eye height and gaze angle shape everyday visual perception. (CREDIT: Getty ...

A scientific dispute spanning six decades about fundamental mechanisms of visual perception in mammals has now been settled.

Any walker or hiker can tell you that an uphill path is more challenging than a flat one. But does it literally look longer, too? A study in the May issue of Attention, Perception, & Psychophysics ...