Why do we Canada Geese roaming all over Chicagoland? Geoffrey Baer has the answer in Ask Geoffrey. NPR story on Canada Geese Living with Wildlife, from University of Illinois Lytton's department store history Chicago Epidemics

Why local lawmakers, the FBI and the Federal Aviation Administration say this device could bring down an aircraft. And what local officials are planning to do to curb what they say is a growing threat to air safety at O'Hare and Midway airports. Our 'More on the Story' coverage

Since IBM's super computer Watson blew its human competition out of the water by winning on Jeopardy, the future of artificial intelligence looks bright. We explore that future. Washington Post with more on the story

Sick of shelling out at the gas pump? We sit down with the so-called father of the "Hypermiling" movement - who says you just don't have to. For more on Wayne Gerdes and CleanMPG.com Chicago Auto Show 2011

IBM's Watson super computer serves up stiff competition to its human challengers on Jeopardy. Ash-har Quraishi speaks with a computer scientist from Northwestern University about what the contest means for Artificial Intelligence. Learn about Watson

This week on Chicago Tonight: The Week in Review, the latest polls are showing mayoral frontrunner Rahm Emanuel pulling away. Cook County Board President Toni Preckwinkle is victorious with both State's Attorney Anita Alvarez and Tom Dart's budget battles. The Washington, D.C. meeting at Transportation Secretary Ray LaHood's office between airline officials and Mayor Richard M. Daley didn't get very far. There's a controversy brewing over the city's blizzard clean-up priorities. And to a chorus of boos, the Bulls' Carlos Boozer returns victorious to Utah.

Traveling the state of Illinois has resulted in the most comprehensive survey yet on the birds of Illinois. We talk to a leading ornithologist about 100 years of change among the state's feathered residents. More information about the book

The ACLU is concerned over the number of surveillance cameras placed around the city. Chicago officials, however, see them as an important safety tool. Eddie Arruza reports on the controversy. Huffington Post article about the dispute

Had you even heard the term "thundersnow" before last week's blizzard? University of Chicago Paleontologist, author Neil Shubin joins us to talk about that phenomenon. Jay Shefsky has the story. National Geographic explains a thundersnow

A new web-based program has been designed to help commuters make their train on time. Nick Shields has the story. Train Tracker beta page

This week on Chicago Tonight: The Week in Review, the Blizzard of 2011 takes Chicago by storm, absolutely paralyzing the city. The third largest blizzard ever caused complete chaos on Lake Shore Drive, with hundreds of stranded drivers and abandoned cars. As the city continues to dig out, some blame city officials for not shutting down the historic thoroughfare sooner. Meanwhile, the mayoral race turns nasty with Carol Moseley Braun accusing opponent Patricia Van Pelt-Watkins of being a crack addict -- then apologizing to her opponent.

Northwestern University is launching the Knight News Innovation Laboratory here. Using a combination of journalism and computer science, this new initiative hopes to improve the way stories like the Blizzard of 2011 are reported. Chicago Tribune story about Knight Innovation Lab

The second part in our series about a historic Chicago snowstorm, featuring harrowing tales of some expectant mothers and the troubling side of the decades-old blizzard.

Perhaps you're wondering when the city will clear your street. We take a look at how the city's removing snow on the side streets. Ash-har Quraishi has the story.

Elizabeth Brackett has the latest on the city's continuing efforts to clean up the mess left behind by the Blizzard of 2011. Watch Elizabeth Brackett's blizzard home video

Where did all these cars go overnight? We show you how the great Lake Shore Drive "car rescue" effort is working. Paris Schutz tells that story. Locate your stranded car