: To help you navigate the world safely, your brain artificially increases the contrast between shades to make the edges of objects easier to see. This is why identical shades of gray can look like a gradient when placed next to different colors. 2. Biological Specialization
Four illusions that reveal the hidden workings of your brain Illusion
: Humans are so specialized in recognizing upright faces that we struggle to notice horrific details in an upside-down face. Once flipped back, the brain instantly processes the features as a whole, revealing the distortion. : To help you navigate the world safely,