Simulating the evolution of the cosmos. A local physicist is here to talk about using supercomputers to delve into the mysteries of the universe.

Twenty percent of children in Cook County are what’s known as food insecure–living in families who can’t afford or can’t access nutritious food. A new program aims to tackle food insecurity among some Chicago-area children and their parents. Take a look at how the program works.

Chicago Teachers Union Vice President Jesse Sharkey on Monday morning announced that 88 percent of its membership has voted "yes" to the question of authorizing a strike. The vote was taken over three days last week, in which 92 percent of members voted.

Cook County Board President Toni Preckwinkle is calling for the resignation of Cook County State's Attorney Anita Alvarez in the wake of the shooting death of Laquan McDonald. Carol Marin talks with Preckwinkle about the crisis surrounding the Chicago Police Department and the sweeping probe of police patterns and practices by the DOJ.

The Laquan McDonald shooting has brought the police union under fire. Is there a culture of cover-up among cops? Dean Angelo, president of the Fraternal Order of Police, joins us.

A revealing look at the massive new collection of contemporary art at the Art Institute, where the Modern Wing galleries have been transformed.

Another missed kick by Robbie Gold, another missed opportunity for the Bears. James "Big Cat" Williams is here to break down the Bears eighth loss of the season. 

State-approved medical marijuana has arrived in Chicago’s Andersonville neighborhood. We get a look inside the first—and so far the only—dispensary to open in the city. 

Test your skills against our latest Chicago Tonight Puzzle. Don’t forget to submit your answer by 10 a.m. Monday for the chance to win a special prize package (and bragging rights!).

A former museum employee allegedly pocketed more than $900,000 over a seven-year period before the theft was discovered. The former employee has yet to be formally charged.

Joel Weisman and his panel discuss Mayor Rahm Emanuel’s apology in the wake of the Laquan McDonald crisis, the search for a new Chicago Police Department superintendent and the possible political fallout from recent events for the mayor.

Dean Angelo, the head of the Chicago Fraternal Order of Police, met with Department of Justice officials in Washington, D.C. this week as the agency begins its civil rights investigation into the Chicago Police Department.

Update: Lorenzo Davis is not able to join "Chicago Tonight" on Thursday.