The So-Called "Video Revolution."

Actress Melanie Mayron. She currently appears in the ABC television program "thirtysomething" as Melissa, the photographer. Her films include "Girlfriends" and "Missing." She stars in and co-wrote the new film "Sticky Fingers."

Singer Susannah McCorkle performs a tribute to composer Irving Berlin, who turns 100 on May 11. McCorkle will perform tributes to Berlin each week at this time throughout the month.

Biologist Daniel H. Janzen's dream is to create a tropical forest in the northwest of Costa Rica. Janzen is a professor at the University of Pennsylvania. (Interview by Marty Moss-Coane)