Children who have repetitive behaviors, a core autism trait, may show particular patterns of brain activity as early as 1 year of age.

Babies eventually diagnosed with autism learn to detect speech sounds later than their typical peers do.

Autism results from an interplay between genetics and the environment, but it has been tough to nail down the environmental factors involved.

Siblings of children with autism have motor difficulties similar to those in autistic children, but milder.

Fearfulness and shyness in babies and toddlers may predict features of autism at age 7.

Machine-learning holds the promise to help clinicians spot autism sooner, but technical and ethical obstacles remain.

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

More boys than girls have autism; diagnostic biases and genetic factors may explain the skewed sex ratio.

Children with autism who participate in research beginning in infancy have less severe autism features than other children with the condition.

Brain waves in infancy forecast autism, people with more autism features have trouble detecting lies, and veterinarians battle claims that vaccines cause autism in dogs.