The National Institutes of Health (NIH) has launched the Autism Data Science Initiative (ADSI), a landmark research effort that will harness large-scale data resources to explore contributors to the causes and rising prevalence of autism spectrum disorder. More than $50 million in awards will support 13 pioneering projects that draw on genomic, epigenomic, metabolomic, proteomic, clinical, behavioral and autism services data. These projects will integrate, aggregate and analyze existing data resources, generate targeted new data and validate findings through independent replication hubs.