A groundbreaking study concludes that human health can be “mostly sustained” for a year in space, a key finding that figures to help NASA with its mission of sending humans to Mars within two decades.

A $9.1 million gift will help the University of Chicago expand its efforts to treat the social, psychological and medical needs of young trauma patients and their families.

Dr. Julie Morita is moving on after two decades at the Chicago Department of Public Health. She tells us about her future plans, and discusses current threats to the city’s health.

More than 90% of individuals in the gang database are people of color, according to Chicago Inspector General Joe Ferguson, who says that puts a strain on police-community relations. “There’s an extraordinary adverse effect on certain communities.”

A Halal lifestyle fest, scaly creatures, roller derby matches and island music usher in the weekend. Here are 10 things to do in and around Chicago.

Watch the April 10, 2019 full episode of “Chicago Tonight.”

Mayor Rahm Emanuel gets a warm send-off from his colleagues at his final City Council meeting. Our politics team tackles that and some of the behind-the-scenes maneuvering over Lincoln Yards.

Ever since Einstein’s theory of relativity first predicted them, black holes have captured the imagination of the public and scientists alike. We speak with two local astrophysicists about this scientific breakthrough.

Sometimes the best thing for a forest or prairie is to burn it. We spend a day with a Cook County burn crew.  

Chicago’s next mayor won’t be sworn in until May 20, but she’s hitting the ground running. On Wednesday, Mayor-elect Lori Lightfoot left the city to meet with top political leaders in Springfield.

A semi-pro baseball team once bested the big leagues on the Northwest Side. Geoffrey Baer takes a swing at local baseball history and its “outlaw clubs.”

More than 128,000 individuals in Chicago are identified as gang-related, according to reports. The city’s top watchdog tells us about the police department’s gang database.

“The Absolute Brightness of Leonard Pelkey” is a wildly creative story about a familiar message brought to life by Chicago actor Joe Foust’s effortless storytelling skills, comic sensibility and emotional range. 

The non-binding measure is being celebrated by environmental advocates, who note that Chicago is now the largest U.S. city to announce a timeline for obtaining all of its energy from renewable sources.

An evidentiary hearing that began Wednesday will be used to determine whether four officers can keep their jobs following accusations they lied about what happened the night Laquan McDonald was killed.