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Saturday’s annual dyeing of the Chicago River celebrates St. Patrick’s Day a little early. (Mike Boehmer / Wikimedia)

A trio of St. Patrick’s Day parades, cultural events and more usher in the weekend. Here are 10 things to do in and around Chicago.

Manganese is one of the materials processed at a refinery in Worsley, Australia. (Courtesy of South32)

Federal limits for exposure to manganese might not be adequate to protect public health, says a Washington University neurologist. 

(Chicago Tonight)

Days after giving $1 million to Chicago Public Schools to support arts and enrichment programming, the Chicago-born rapper named 10 individual schools that would each receive a separate gift from his nonprofit organization, SocialWorks.

(Courtesy of Jahmal Cole)

Meet the founder of the nonprofit group My Block My Hood My City, who believes in the power of change.

Visit a Northwest Side high school where a food science lab is growing the next generation of urban farmers.

Neil deGrasse Tyson joins Chicago Tonight’s Eddie Arruza for an extended conversation about science and our place in the cosmos. 

Police Superintendent Eddie Johnson testifies in Springfield in favor of tougher sentences for repeat gun offenders. But will his proposed changes actually make the city safer?

Watch the March 9, 2017 full episode of "Chicago Tonight."