on these attitudes, the sea can be terrifying. they say that below 40 degrees south there is no law. but below 50 there is no god. at the ends of the earth is a land of extremes dog humbly spectacular wildlife. for centuries, people and animals a battle for supremacy. of but now, animals are becoming allies. together, they face new challenges. in a rapidly changing world. >> you are at the mercy of elements. this is the story but it takes to survive. on the edge of the world. patagonias far south is dominated by the wind. big and the cold. yep. extending below the 15th parallel, no other land mass lies so close to antarctica. . to survive here takes resilience. it's determination and sometimes sheer size. much of the land is just empty, wind blasted tendril of. of but the c is teaming with life the humpback whale. the 30-time giant has traveled all the way from its winter breeding grounds in the tropical pacific, a journey of more than 4000 miles. on its tails wildlife veterinarian. tyndall >> -- these are the waters of the marine park and the straits of magellan. they were the forceful mixing of the pacific ocean stores of nutrients, the food is so plentiful the whales behave in extraordinary ways. of to make his case, frederick needs proof that she is just. that is taking example but chasing wales and boats may panic them. so, fredericton's team are trying something new. a drone, its mission is to have all and the cap a sample of it's not. . samples reveal levels of stress hormones as well as pollution. but catching a sample is easier said than done. missed, the whale disappears. flying against so. and they're running out of juice if it doesn't surface soon, it has to give up. one last chance. gotta. federer koepka his sample provide the proof that this humpbacks need protection. the rich waters of patagonia's far cells have the power of life and death. the cnn orinal series is brought to budge if, there's only one. media quizzes. because the only way you're ever gonna know is by heading into the big, wild, raging so-damned-beautiful- it-hurts world and finding out for yourself. were you born to follow a path? or were you born free? these are the things we thought about when we made the new grand cherokee. made for what you're made of. ♪ ♪ before treating your chronic migraine— 15 or more headache days a month, each lasting 4 hours or more you're not the only one with questions about botox®. botox® prevents headaches in adults with chronic migraine before they even start—with about 10 minutes of treatment once every 3 months. so, ask your doctor if botox® is right for you, and if a sample is available. effects of botox® may spread hours to weeks after injection causing serious symptoms. alert your doctor right away, as difficulty swallowing, speaking, breathing, eye problems, or muscle weakness can be signs of a life-threatening condition. side effects may include allergic reactions, neck and injection site pain, fatigue, and headache. don't receive botox® if there's a skin infection. tell your doctor your medical history, muscle or nerve conditions, and medications, including botulinum toxins, as these may increase the risk of serious side effects. in a survey, 92% of current users said they wish they'd talked to their doctor and started botox® sooner. plus, right now, you may pay zero dollars for botox®. learn how abbvie could help you save on botox®. 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(vo) with 5g ultra wideband in many more cities, you get up to 10 times the speed at no extra cost. get verizon business unlimited from the network businesses rely on. ♪ the san rafael glacier. located in southern chile, hundreds of miles north of the king penguin colony. it empties into an almost land-locked lagoon. because of the steepness of this glacier and climate change, a lot of ice falls here. on average, a volume twice the size of the empire state building crashes into the lagoon every day. and the fractured ice floes high a formidable predator. a leopard seal. normally, they live and breed almost exclusively in the antarctic. where penguins are one of their main prey. but in the san rafael lagoon, more than 1200 miles from antarctica, there are no penguins, and it's a mystery how these seals are surviving here. on a mission to learn more about them is national park ranger nicolas fernandez. >> although nicolas doesn't get half the funds to analyze the seals' diet, he thinks he knows what they're eating. large numbers of pat gonian rock cod live just below the glacier wall. whenever there is an ice fall, the leopard seals swim directly for it. nicolas suspects the leopard seals are hunting fish, scattered by the impact. but his biggest discovery has come from his observation of this particular seal . >> nicolas has proved this is the most northerly established breeding population of leopard seals on the planet. in a world where so many large predators are disappearing, the arrival of this incredible hunter into new territory is remarkable . >> here in patagonia's far south, life is making a comeback. returning home to habitats once abandoned. growing in number. and even expanding into new areas. there are still great challenges ahead, but the people here love this place and the life it substance. sustains. with such passion and commitment, anything is possible. ♪ next on "patagonia: life on the edge of the world," these are the forests that time forgot. home to creatures both strange and wonderful. amazing things happen up in the trees. this blurry picture of my mom and dad from 2018 was taken in las vegas. i took it because i don't have that many pictures of my parents together, because they ain't together. it was an unusual event made more unusual because we'd all gone to vegas to escape this. >> devastating news out of california. >> the camp fire. >> the camp fire. >> the camp fire. >> houses and flames, forests being scorched. >> the most destructive fire in california history. >> agh. lucky for us the fires hadn't made it to where my family lives in