Genetic sequences from nearly 53,000 people with autism, developmental delay or intellectual disability reveal strong ties to 98 genes.

Brothers and sisters of people with autism are both about two to three times more likely than the general population to have an autistic child themselves.

About 17 percent of children with autism are calmer and more communicative than usual when they have a fever.

Mutations that appear in only some of the body’s cells contribute to autism in about 4 percent of people with the condition.

A monkey study suggests facial recognition is not innate, a puzzle piece symbol carries negative connotations, and scientists are using a federal law to snoop on colleagues.

Children with autism are genetically more similar to one another than to a group of unaffected siblings.

About 8 percent of non-inherited mutations in people with autism occur in only some of the body’s cells, according to a study of 20,000 people.

Some children with autism carry harmful mutations in the DNA found in mitochondria, the cell’s energy producers.

Large autism-linked mutations tend to be inherited in families with a history of the condition. By contrast, they often arise spontaneously in families with a single affected person.

A study of more than 2,500 families that have at least one child with autism has found three factors that predict autism symptoms in an unaffected sibling.