Miguel and Paco start the week in the back of a pick-up truck, riding through San Diego Wild Animal Park. They see the prehensile tongue of a giraffe up close. A worker explains how giraffes evolved to its long-necked self.

Kathy and Robin go to Magi, a 3-d computer animation studio. Christine Chang, a computer scientist, shows how masic shapes turn into complicated animal shapes.

Back at the Wild Animal Park, Miguel and Paco see how an elephant's trunk can pick up things.

FILM INSERT: Basic shapes are all over the world.

ANIMATED MUSIC VIDEO: The Way It Was shows how the continents were together millions of years ago.

BIOGRAPHY: Botanist Elma González reflects on her life and her inspiration for studying the cells of plants.

FILM INSERT: Basic shapes are all over the universe.

Back at the Wild Animal Park, Miguel and Paco emcounter a Bactrian camel. An expert explains that animal families are determined by the similarities of different animals.

THE BLOODHOUND GANG: ""The Case of the Ma