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Author Walter Isaacson talks about his comprehensive new biography “Leonardo da Vinci,” which delves into the staggeringly inquisitive and creative giant of the Renaissance.

(Brenna Hernandez / © Shedd Aquarium)

Over the past year, staff from Shedd Aquarium’s Animal Response Team have come to the aid of animals across the globe. Here’s an update on how some of them are doing.

It’s open season for hunters of Canada geese, but the migrating birds have found a novel way to stay out of the firing line: wintering in the city. Rabiah Mayas joins us with that story and more from the world of science.

Audrey Jones of AB Art Window Painting (Chicago Tonight)

Around Chicago, windows decorated for the holidays are a sure sign that Christmas is on its way. Meet a local artist whose festive fancies could be swirling across a storefront in your neighborhood.

A surfer rides the waves on the south end of Lake Michigan. (Credit: Mike Killion)

Surfer environmentalists and the University of Chicago intend to sue U.S. Steel over toxic Lake Michigan spills after it twice releases more than the allowable quantity of a cancer-causing chemical into the waters this year.

A new study looks at how young men view sexual interactions – and finds that some have difficulty understanding whether a woman is giving consent to have sex.

(Ken Teegardin / Flickr)

A taxpayer watchdog group releases a list of the top 200 pension earners in Chicago, and all of them make more than six figures annually. But are high benefits the only reason Chicago taxpayers are drowning in red ink?

Watch the Dec. 12, 2017 full episode of "Chicago Tonight."