Autistic people have trouble making facial expressions appropriate to the circumstances.

The pupils of babies later diagnosed with autism shrink more in response to light than those of their typical peers.

The ability to identify human-like movements is rooted in genetics — and may share those origins with autism traits.

A person’s ability to distinguish similar syllables by sight and sound correlates with how sensitive she is to sensory stimuli.

Two new gadgets join the gene-editing toolbox, many children with autism get smarter with age, and a survey points to a research reset for Autism Speaks.

The pupils of preschoolers with autism are slow to constrict in response to light, a phenomenon that may serve as an early marker of autism risk.

Lowering the levels of OTX2, a protein found in the fluid that bathes the brain, prevents many abnormal behaviors in mouse models of Rett syndrome.