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A kickoff event for the Go Blue Chicago Restaurant Collective will be held Tuesday, March 28 at Nellcote. (Element Collective)

Throughout the month of April, nearly two dozen Chicago-area restaurants will offer special menu items to raise awareness and funds for child abuse prevention programs.

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WBEZ data reporter Chris Hagan

Cook County is shrinking again – and the 2016 drop in population is the biggest of any county in the entire country. Is this just a statistical blip or the beginning of an alarming trend?

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Alvin Ailey Dance Theater brings its unique, mixed-dance style to Chicago. (Courtesy of Paul Kolnik)

Dance performances and festivals, Bon Jovi and street markets. Here are 10 things to do in Chicago this weekend. 

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In the early 1960s, bald eagles were nearly extinct in the lower 48 states. But government protections and conservation measures have had a huge impact on their numbers. “I think it’s an incredible success story,” said biologist Chris Anchor.

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“Armor for Man and Horse,” about 1520 with modern costume. South German, Nuremberg. The Art Institute of Chicago, George F. Harding Collection.

The Art Institute of Chicago unveils new galleries of medieval and Renaissance art – including the re-installation of the popular arms and armor collection. We get a sneak peek.

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From gay marriage to contraception: how sex, religion and morality shape U.S. law.

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Next week, the Jeff Award-winning actress and singer releases her first recording, called “First.” She joins us in performance and discussion.

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(Dustin Tinney / Flickr)

In his book “The Death and Life of the Great Lakes,” author Dan Egan chronicles the history of the world’s largest group of freshwater lakes as well as the natural and man-made dangers threatening it.

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We explore two neighborhoods that are at the epicenter of the gentrification battle, and how elected officials, community groups and developers are waging it.

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Images like this one from Helen Balfour Morrison comprise the exhibition “Photographing Freetowns.”

A new exhibition at the Newberry Library features a rarely seen collection of work by a Chicago-area photographer who documented the history of small communities founded by former slaves after the Civil War.

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Lake Calumet (Tom Kort / boatnerd.com)

Lake Calumet has changed shape and purpose many times over the years. Geoffrey Baer takes a look at its past and future in this encore edition of Ask Geoffrey.

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(Maria Varela / Courtesy of the National Museum of Mexican Art)

A collection of photographs by Maria Varela at the National Museum of Mexican Art portrays the evolution of social movements in the U.S.  

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(Evan Garcia / Chicago Tonight)

Looking at the impact of a proposed funding cut to the program that aims to keep invasive species out of the Great Lakes.

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A hefty Bighead carp, one of several types of Asian carp, caught in a net near Morris, Illinois. (Evan Garcia / Chicago Tonight)

Wildlife agencies and fishermen in Illinois are using a Chinese technique to catch Asian carp, an invasive fish species threatening the Great Lakes ecosystem.

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

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A new program aims to get all arrestees a defense attorney while in police custody.