Without enough shut-eye, a smile can look more like a scowl. And the price for that mistake can be high.

Perception is strongly influenced by prior knowledge, lending credence to the theory that the brain does not faithfully represent the environment but rather attempts to predict it.

Mice engaged in stimulating activities were less likely to seek out cocaine.

Our brains are wired to convert smells into spatial information, allowing us to navigate territory by following one's nose.

Walking infants are better able to speak and understand their native language — regardless of what language that may be — than crawling infants of the same age.

Emotion expert helps guide Pixar movie on uprooted tween's rush of feelings.

Study: Children who moved more intensely exhibited substantially better cognitive performance.

A gene involved in the regulation of serotonin makes some of us more prone to spontaneous smiles and bursts of laughter.

The brain has a major system that seems predisposed to get us ready to be social in our spare moments.

That is, until they go against the norm: addressing transgender issues in children.

The sense of something greater than the self encourages cooperative behavior.

Despite egalitarian efforts to downplay class as a forecaster for intelligence and achievement, many people still believe their destiny is tied to their station in life.