Call to Earth polar bear
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Call to Earth Day 2023: The threat of climate change to polar bears
Students from Villare School, Brazil, explain how climate change is effecting polar bear populations, as well as the whole Arctic.
00:59 - Source: CNN
Call to Earth 16 videos
Call to Earth polar bear
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Call to Earth Day 2023: The threat of climate change to polar bears
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Restoring the 'River of Grass'
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Saving South Africa's endangered sandfish
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Meet the blind conservationist fighting to save nature’s soundscapes
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<p>Iracambi, an environmental organization, is working with the indigenous Puri people to restore biodiversity in the Atlantic Forest in southeastern Brazil, an area experiencing higher rates of deforestation than the Amazon.</p>
Guardians of the Forest Seeds: Restoring Brazil's Atlantic Forest
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Protecting Mexico's bats
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Protecting Nigeria's endangered primates
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Call to Earth: Searching for super coral
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Photographer captures the Milky Way in one of the UK's darkest places
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<p>A pioneering project in southeastern England has reintroduced the European bison to help restore its ancient woodlands.</p>
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A long-lost woolly giant returns to the UK
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Saving one of the oldest living creatures on Earth
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Monitoring killer whales with AI
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SIMONS TOWN, SOUTH AFRICA - JUNE 29: African penguins gather at the end of the afternoon at Boulders Beach June 29,2010 in Simon's Town, South Africa. The vulnerable species live in a penguin colony in False Bay that is part of Table Mountain National Park. Since breeding two pairs in 1982, the penguin colony has grown over the years to over 3,000. Tourists in country for the World Cup have brought double the usual numbers of people visiting the famous penguin breeding ground. (Photo by Paula Bronstein/Getty Images)
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The race to save the African penguin
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Saving saiga in Kazakhstan's 'Golden Steppe'
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Call to Earth: Kings of the forest
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<p>During the commercial whaling era of the 19th and early 20th centuries, humpback whale populations were reduced by an estimated 95%. An international ban on the practice has since helped the species rebound. Photographer Chris Fallows takes CNN out to sea for a firsthand look at the iconic species.</p>
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The comeback of the humpbacks
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