Three stars. Unrated.101 minutes. By Lora Grady Special To The Washington Post Bill Nye, the lanky, bow-tied TV science advocate, is still a hero to a generation of young adults who eagerly watched his 1990s series, “Bill Nye, the Science Guy,” in classrooms or on afternoon television. The fast-paced, half-hour educational show made science fun, with hands-on experiments that kids could replicate at home.