In this episode we talk to the man who holds the record for the longest stay at sea after a shipwreck, we interview Txema Brotons – scientific director and founder of Tursiops and one of the greatest experts on sperm whales – we explore the origins of life on our planet, we listen to Fran Contreras about magical sanctuaries at sea, we analyse how climate change affects marine biodiversity and we accompany Juan Herrera in his oceanic hypotheses.