Viewers weigh in on bike safety following our roundup of Chicago cycling news.

Watch the Oct. 9, 2017 full episode of "Chicago Tonight."

In the early 1960s, bald eagles were nearly extinct in the lower 48 states. But government protections and conservation measures have had a huge impact on their numbers. “I think it’s an incredible success story,” said biologist Chris Anchor.

Eli Finkel studies relationships and marriage, and in his new book “The All-or-Nothing Marriage: How the Best Marriages Work,” he argues the best marriages of today are the best the world has ever known.

Cryptic comments, contradictory statements and tweets: President Donald Trump’s foreign policy approach has some members of his own party on edge.

Considered one of the founding fathers of behavioral economics, a field that bridges the gap between economics and psychology, Richard Thaler is known for illustrating how human behavior often contradicts traditional economic logic.

Mayor Rahm Emanuel says the Chicago Police Department’s murder clearance rate is “unacceptable,” as are details out this week describing an “abuse of culture” surrounding police overtime pay. Watch the interview.

Watch the Oct. 5, 2017 full episode of "Chicago Tonight."

A web series that debuted in February has already been picked up by HBO. Made in Chicago, it highlights the friendships between young women of color. We talk with the award-winning poet who co-created the series, and an actor from the show.

The Cook County board president used her annual budget address Thursday to warn commissioners and the public that repealing a tax on sugary drinks will take the county down a path of “fiscal uncertainty” that will result in layoffs and cutting “essential services.”

We preview the start of the Cubs’ playoff run with sports reporter Cheryl Raye Stout.

Watch the Oct. 4, 2017 full episode of "Chicago Tonight."

Geoffrey Baer explores an eccentric architect’s wacky proposal for the World’s Fair in this encore edition of Ask Geoffrey.