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The Chicago-based Bulletin of the Atomic Scientists announced Thursday that the clock will now be set at 100 seconds to midnight. (Lexey Swall Photography / Bulletin of the Atomic Scientists)

The world is closer to global catastrophe today than at any point since World War II, according to a group of international nuclear and climate scientists.  

Jim Lehrer speaks at the Miller Center of Public Affairs in Charlottesville, Virginia, in 2011. (Steven Morgan / Wikimedia Commons)

Jim Lehrer’s longtime colleague and current “NewsHour” anchor and managing editor Judy Woodruff announced the news in a release, saying Lehrer died peacefully in his sleep at home.

(Chicago Police Department)

Chicago police say surveillance photos released earlier this month helped detectives identify the offender.

(Sarah A. / Flickr)

Three CTA Red Line stations in Edgewater will be closed from Friday night through Monday morning, marking the first of several planned weekendlong closures. The Grand Blue Line station will also be closed this weekend.

Watch the Jan. 23, 2020 full episode of “Chicago Tonight.”

(Jo ana Kubiak / Lurie Garden)

Lurie Garden's four-season approach to plantings provides a prime example of the beauty and life to be found in a winter garden.

Photographs from the Archive of Joseph Sterling (Courtesy Stephen Daiter Gallery)

Sixty years ago, a young photography student aimed his camera at Chicago teens. His name was Joseph Sterling, and we visited an old classmate of his for a closer look at the process of capturing youth culture and Chicago in the mid-20th century.

A nutrition fact label for vanilla yogurt shows a 6-ounce serving contains 20 grams of sugar – of which 18 grams are added sugars. (Kristen Thometz / WTTW News)

If you regularly check nutrition fact labels, you may have noticed some recent changes – namely, the addition of added sugars and realistic serving sizes. Those changes and others went into effect Jan. 1 per new FDA guidelines. A local registered dietitian explains.

(WTTW News)

Advocate Trinity Hospital, Mercy Hospital & Medical Center, South Shore Hospital and St. Bernard Hospital plan to create a single system with one leadership team.

House Democratic impeachment managers, from left, House Intelligence Committee Chairman Adam Schiff, D-Calif., Rep. Jason Crow, D-Colo., Rep. Zoe Lofgren, D-Calif., and House Judiciary Committee Chairman Jerrold Nadler, D-N.Y., arrive for the start of the third day of the impeachment trial of President Donald Trump at the Capitol in Washington, Thursday, Jan. 23, 2020. (AP Photo / J. Scott Applewhite)

It’s day two of opening arguments in the impeachment trial of President Donald Trump, and House managers are laying out their case for abuse of power. A former Supreme Court clerk offers his take on the proceedings so far.

An illustration of Tiktaalik by Flick Ford. (Courtesy of the University of Chicago)

Sixteen years after making a key discovery with two colleagues, University of Chicago paleontologist Neil Shubin and others are deepening their understanding of an extraordinary, ancient fish.

(WTTW News)

When a massive gambling expansion package was signed into law in June, early hopes were that Illinois gamblers would be able to wager on the Super Bowl. Such bets are off, but new rules move the ball forward.