Guests: Kathleen Dudzinski, Director of the Dolphin Communication Project, and Toni Frohoff, Director of TerraMar Research.

Humans have long since been fascinated by dolphins, but the details of their lives and communication have remained elusive. Today on Focus, we're joined by marine researchers Kathleen Dudzinski and Toni Frohoff. They'll talk about the strides they've made in dolphin research, and how they've proved that dolphins have social signals that they can use to share information among themselves and with humans.