Coral reefs evolved 240 million years ago, but now scientists say coral reefs could be gone before the end of this century. They say the biggest threat is the warming ocean water. Three major institutions in Chicago are now actively engaged in the fight to save the coral reefs.  

Watch the May 3, 2016 full episode of "Chicago Tonight."

Donald Trump has racked up a number of victories in his presidential bid, but he's also been a big winner in Chicago. Hear from the Sun-Times reporters who've uncovered Trump's big tax breaks thanks to Ald. Ed Burke (14th Ward).

The barbs turned personal during Tuesday's primary battle in Indiana. Trump claimed another victory, and Cruz suspended his campaign. What will these results mean for the big picture?

We have the latest on action from Springfield, including whether or not a secret budget working group has a grand bargain in the works to finally break the budget stalemate.

“We are now seriously pursuing locations outside of Chicago,” Mellody Hobson, wife of movie mogul George Lucas and board member of the Lucas Museum, said in a statement. “If the museum is forced to leave, it will be because of the Friends of the Parks and that is no victory for anyone.”

From his studio in Bronzeville, Kerry James Marshall creates large-scale canvases that are prized in museums around the world. A 1997 winner of a MacArthur "genius" grant, Marshall spoke with “Chicago Tonight” at the opening of his career retrospective at the Museum of Contemporary Art. 

Watch the May 2, 2016 full episode of "Chicago Tonight."

Police union president Dean Angelo denies racism in the ranks. He faces off with Police Accountability Task Force chair Lori Lightfoot over the group's scathing report.

A new video featuring two local journalists unveils the hostility some female sports reporters face online. One of the journalists, Julie DiCaro, joins us to talk about the attacks she faces and how she fights back.

Will Illinois move to a graduated income tax from a flat tax, and will it end the practice of gerrymandering legislative maps? Tuesday marks the deadline in the Illinois General Assembly to pass laws to change these practices.

Epic yet intimate Rodgers and Hammerstein revival earns an opening night standing ovation at the Civic Opera House.

In the final days of the Vietnam War, an effort to rescue thousands of babies from the country brought one of them to Chicago. Brandis Friedman shares the story of how he rose to become a Michelin-starred chef.

The National Bison Legacy Act aims to put the largest land mammal in America on the same level as the bald eagle, the country's national bird and a cultural symbol of independence.