It's official! Prince William and Duchess Kate Middleton welcomed a baby boy in London. Author, blogger and local Brit-commentator Toni Hargis joins us with details about the hoopla surrounding the birth of the royal baby.

Chicagoan Allegra Rosenberg, 17, has become a YouTube sensation, writing songs beloved by fans of Doctor Who, BBC Sherlock and other off-beat pop culture hits. We revist Jay Shefsky's profile. Watch music videos.

Chicago cop-turned-actor Dennis Farina died today at age 69. Watch web extra video of Farina from WTTW's archives.

A playwright uses the internet to develop a new script about the fight to build a suburban mosque. We get a preview of Mosque Alert by Silk Road Rising and Jamil Khoury. Watch a video and read an interview.

We take a look at Chicago's famous skyscrapers-- and the political deals that shaped them. Author Thomas Leslie joins us with more from Chicago Skyscrapers: 1871-1934. Read an interview.

Iconic photos of rock stars, yoga at the zoo, and a Parade of Nations at an ethnic arts festival; Chicago Tonight knows what's going on this weekend.

Jeanne Nolan left Winnetka as a teenager in 1987, frustrated with what she saw as an unhealthy materialism in everyday life. She joined a commune in California to learn organic farming, but eventually realized the commune, with cult-like leaders, was a dangerous place to be. Moving back in with her family 17 years later, without traditional job training, she turned her parents' backyard into an organic garden. She joins us. Read an interview with Nolan.

The new Art Institute of Chicago exhibition, Impressionism, Fashion, and Modernity, is the first of its kind to look exclusively at the ways in which the Impressionists used fashion to communicate the idea of "modern." View a slideshow and read excerpts from the fashion catalogue.

For 40 years, jazz promoter Geraldine de Haas has been an icon in the Chicago music scene. We welcome her back for one last visit to discuss her influential career before she moves out of town. Read an interview with a local jazz performer.

After a one-year sabbatical at Harvard University, the Chicago Tribune’s architecture critic Blair Kamin is back in Chicago. He joins us to chime in on some hot-button architectural stories unfolding in the city.

Hot dog lovers come from around the world to eat at Hot Doug's. "Hot Doug" himself, owner Doug Sohn, gives us a behind-the-scenes look at how he got started. Read a Q&A.

We revisit Jay Shefsky's profile of the lifelong model railroader who now keeps the trains running at the Museum of Science and Industry. Read an article and watch a video.

Chicago’s premier rock and roll photographer talks about 37 years of incredible access to the Rolling Stones, Bruce Springsteen, Prince, and everybody who’s anybody in popular music. On the eve of a new, interactive exhibit of his photos at the Elmhurst Historical Museum, we visit Paul Natkin in his home studio and on assignment shooting the Chicago Blues Fest. Read a Q&A.

GQ editor Michael Hainey travels back in time to uncover the true story of his father’s mysterious death. We revisit a conversation with Hainey about his book, After Visiting Friends: A Son's Story. Read an excerpt and watch a web extra video.

Artists are putting the finishing touches on a new mural in Chicago's Sauganash community on the northwest side. The mixed-media mural fills the walls of an empty bicycle underpass at the corner of Peterson Avenue and Kostner Avenue.

Think of Chicago in 1893, and the World's Columbian Exposition comes to mind--with millions of visitors flooding the Midway to visit the White City. But 1893 was a seminal year for Chicago for at least a dozen other reasons, including something as seemingly insignificant as the debut of a new brand of chewing gum. Author Joseph Gustaitis joins us with stories from the year that changed Chicago forever. Read an article.