From siblings with snowballs to wrestling chimpanzees, playful behavior is usually easy to spot. But the question of why we play – and whether we all play for the same reasons – is less apparent.

Watch the Dec. 14, 2017 full episode of "Chicago Tonight."

Historic clocks from around the world and brilliant stained glass windows fill a new museum in Evanston. We go for a look.

On Sunday, the Chicago Board Options Exchange became the first major U.S. exchange to start trading bitcoin futures, allowing traders to place bet on the commodity’s future value.

While Fed Chair Janet Yellen ends her tenure on an upbeat note, are there storm clouds ahead for the economy?

The longtime Chicago journalist talks about his new book “Murder in the News: An Inside Look at How Television Covers Crime.”

The Goodman Theatre marks its 40th year of presenting the holiday classic with some new actors, some new interpretations and new ways to bring in audiences.  

Federal funding for the Children’s Health Insurance Program expired in September. On Thursday, dozens of protesters called on Congress to reauthorize funding for the program. “Babies can’t wait,” said Ireta Gasner of the Ounce of Prevention Fund.

The Federal Communications Commission votes to repeal Obama-era protections for internet neutrality, citing the elimination of unnecessary regulations. But critics fear internet service providers may start using fees and censorship to limit access to some sites.

For 70 years, hunters have been shooting waterfowl at Wolf Lake on the city’s Far South Side. It is the only state park within city limits, and one of the only places to hunt in Chicago. We go for a visit.

From ostrich eggs to walnut shells: We explore a collection of unusual and traditional Nativity sets from around the world.

Watch the Dec. 13, 2017 full episode of "Chicago Tonight."

Does Doug Jones’ upset signal a building blue tsunami that could help Democrats retake the House – and maybe even the Senate – in 2018?

The up-and-coming Italian tenor is already being compared to the legendary Luciano Pavarotti. Stefano La Colla joins us in conversation and performance.

A gene found in an Amish family in Indiana may hold the secret to living longer and healthier. We speak with the lead author of a new study.