The Triangle has become a hotbed for experimental film, in large part thanks to the efforts of people like Bill Brown and Sabine Gruffat. For the last three years, the two filmmakers and UNC-Chapel Hill professors have put on Cosmic Rays Film Festival, screening works ranging from three to fifteen minutes that expand the traditional boundaries of cinema. This year’s program includes legendary experimental filmmaker Naomi Uman amid a diverse roster of up-and-coming contemporary artists. All screenings are free. —Will Atkinson