Since the 1960s, our knowledge of orcas has evolved. This whale species once feared as apex predators and "killers of the deep" are now seen as extraordinarily intelligent, emotional, and social animals. In this documentary from The Nature of Things, marine biologist Dr. Sarika Cullis-Suzuki meets up with some of the scientists who have transformed our awareness of orcas.

From the Curio.ca streaming audio-visual collection.