The Ganga River, known as the Ganges under British rule, is one of the most revered waterways in the world -- and also among the most polluted. Stretching from the Himalayan foothills to the Bay of Bengal, it provides water to nearly half a billion people, more than any other river in the world. Special correspondent Fred de Sam Lazaro reports from India on the latest efforts to clean the river.

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Battle of the Sexes Movie Clip - Press Release (2017): Check out the new clip starring Emma Stone, Bill Pullman, and Sarah Silverman! Be the first to watch, comment, and share clips and behind the scenes dropping @MovieclipsComingSoon.

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The 1973 tennis match between Billie Jean King and Bobby Riggs became the most watched televised sports event of all time. Trapped in the media glare, King and Riggs were on opposites sides of a binary argument, but off-court each was fighting more personal and complex battles. With her husband urging her to fight for equal pay, the private King was also struggling to come to terms with her own sexuality, while Riggs gambled his legacy and reputation in a bid to relive the glories of his past.

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Escape was one of the many ways that enslaved people resisted their captivity in the system of American slavery. The Underground Railroad was not literally a railroad. It was a network of people, routes, and safe houses that helped people escape from slavery in the south to freedom in the north. Today we'll talk about the origins of the Underground Railroad, the systems that helped people escape, and the people who helped along the route.

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Thurgood Marshall was one of the country's greatest jurists and civil rights advocates, but he was also a gifted storyteller who liked to leaven even a serious tale with a sprinkling of humor. With his keen intelligence and wit, he was a source of inspiration for the young lawyers who worked in his chambers. In a video prepared by the Administrative Office of the U.S. Courts in recognition of African American History Month, five of Marshall’s former clerks share their recollections of the legal mastermind behind the landmark Brown v. Board of Education decision who went on to become America’s first African American Supreme Court justice. The video was created in partnership with the U.S. Court of Appeals for the Second Circuit, where Marshall served before his elevation to the high court.

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Astronaut Roy McBride (Brad Pitt) travels to the outer edges of the solar system to find his missing father and unravel a mystery that threatens the survival of our planet. His journey will uncover secrets that challenge the nature of human existence and our place in the cosmos.

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On Friday March 16, Tens of thousands of Australian students walked out of school to march in support of action on climate change.

Sydney organisers Jean Hinchliffe and Ambrose Hayes joins ABC News Breakfast to explain why marched, and why they marched on a school day.

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A look at the story of the rise and fall of what was once one of Americas largest cities and where it goes from here...

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Prince Harry runs into Aotearoa New Zealand Trip Raters. How would your holiday rate you?

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