Rabiah Mayas returns to review some of the latest, breaking stories from the world of science.

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.

Northwestern University professor Brian Edwards joins us to discuss a new report on the decline of second-language education in U.S. schools.

Watch the May 4, 2017 full episode of "Chicago Tonight."

Chicagoans got their first look Wednesday at plans for the Obama Presidential Center. Tribune architecture critic Blair Kamin gives us his first impressions.

A look at the Chicago Police Department's technological crime-fighting strategy.

A year to the date that Illinois human service providers first went to court, the Pay Now coalition again asked the judicial branch to force the state to make good on its contracts. 

With the city’s mounting gun violence, some remain skeptical about the effectiveness of a little-known city ordinance called the Gun Offender Registry. A special report from DePaul University's Center for Journalism Integrity and Excellence.

City Clerk Anna Valencia joins us to discuss her position and Chicago’s municipal ID program.

Viewers summed up their thoughts about math after our talk with "Beyond Infinity" author Eugenia Cheng.

All seven Illinois House Republicans voted in favor of the bill Thursday that rolls back several features of the Affordable Care Act.

A candidate for Illinois governor gets an early boost from one of Democrats’ traditional allies.

Watch the May 3, 2017 full episode of "Chicago Tonight."