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Sonic Sea is a 60-minute documentary film about the impact of industrial and military ocean noise on whales and other marine life. It tells the story of Ken Balcomb, a former US Navy officer who solved a tragic mystery involving a mass stranding of whales in the Bahamas and changed forever the way we understand our impact on the ocean. Professor Callum Roberts from the Environment Department at The University of York will give will give a brief introduction to the film, reflecting on the state of the oceans and our efforts to increase their protection.