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“After 40 years I've decided to end my term as host and senior editor of this show I helped create,” Joel Weisman said. A special show next month will mark the show’s fourth decade, and Weisman’s final appearance as host.

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Like the city that grew around it, the Chicago River is constantly changing. Get a preview of “The Chicago River Tour with Geoffrey Baer.”

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Chicago television has a rich and colorful history. But few moments are quite as colorful—or bizarre—as the incident that happened to this very station in 1987.

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Temur Suluashvili and Lucia Connolly in rehearsal for “The Nutcracker.” (Photo by Todd Rosenberg)

The new documentary “Making a New American Nutcracker” premieres on WTTW. We speak with the Joffrey Ballet’s artistic director and the film’s producer.

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A still image from “The Vietnam War” series from documentary filmmakers Ken Burns and Lynn Novick.

On Sunday, “The Vietnam War,” a new 10-part documentary from Ken Burns and Lynn Novick, premiered on WTTW. Burns and Novick were in Chicago last week and sat down with “Chicago Tonight” to talk about the epic work.

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A still image from “The Vietnam War” series from documentary filmmakers Ken Burns and Lynn Novick.

Filmmakers Ken Burns and Lynn Novick speak with us about their new 10-part documentary series, “The Vietnam War.”

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In his new PBS special, Geoffrey Baer is immersed in the city’s vibrant culture—architecture, music, dance and history—with three native Cubans as his guides.

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If you want to know what Chicago looked like 200 years ago, head to the city’s southeast corner, where native wetlands, forests and prairies all come together.

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Vacant city lots are often dismissed as derelict urban eyesores, but now some environmentalists are viewing these empty spaces as ecological opportunities. 

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Coyotes have made a remarkable comeback in Chicago. What are the secrets to their survival in a dense metropolis? Marcus Krahnforst hunts for clues with noted biologist Stan Gehrt in this “Urban Nature” episode.

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The monarch butterfly’s remarkable migration is in peril. Its habitat has been decimated by rapid urbanization and changing agricultural practices. Could cities come to the rescue?

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(BirdPhotos.com / Wikimedia Commons)

Why do some squirrels live in more affluent neighborhoods, while others dwell in more disadvantaged ones? WTTW's online series “Urban Nature” has the story.

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Dead birds collected by the Chicago Bird Collision Monitors were given to the Field Museum's Bird Division. (Josh Engel / The Field Museum)

For migrating birds, Chicago can be a dangerous place. But scientists, architects and volunteers are now teaming up to make the city a leader in bird-friendly design. The story is told in WTTW's online series “Urban Nature.”

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A new WTTW web series peeks into pockets of nature in cities across the country.

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St. Augustine, Florida

Geoffrey Baer visits 10 American towns in the final installment of the "10 That Changed America" series, airing at 8 p.m. Tuesday night on WTTW.

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The second installment of WTTW's "10 That Changed America" premiers Tuesday. This time, host Geoffrey Baer looks at 10 American parks that changed how we live and play in our cities.