As part of our Autism Now series of reports, below is an extended transcript excerpt, edited for length, relevance and clarity, with Irva Hertz-Piccotto, chief of the division of environmental health at U.C Davis and a faculty member at the…

In the second report in his Autism Now series, Robert MacNeil investigates why the number of children with autism is increasing in the U.S. He meets children at different points on the autism spectrum and gets several views on the…

NewsHour founder and former anchor Robert MacNeil's six-part series on the puzzling prevalence of autism in the U.S. starts to air Monday on the PBS NewsHour. MacNeil speaks with Jim Lehrer about what's explored in the series and describes how…