RIP Janet Waldo, Hanna-Barbera's iconic teen girl voice

Janet Waldo, who died Saturday, voiced many iconic young women for Hanna-Barbera in her 40s and 50s, including Judy Jetson, Penelope Pitstop, and Josie from Josie and the Pussycats.

850 photos: Making of Yogi Bear and The Flintstones in 1960

LIFE photographer Allan Grant took 850 photos documenting Hanna-Barbera studios in 1960.