When critics Roger Ebert of the Chicago Sun-Times and Gene Siskel of the Chicago Tribune were paired in 1975 they could not have imagined they would become household names everywhere. But "Sneak Previews" would soon become a staple on public television across the country. A half-century later, their approach to judging films remains the standard.

We look back at the rivals, how the show began and events being held in Chicago to mark the anniversary.

Also:

* Environmental reporter Jess Savage tells us about the environmental benefits of "leaving the leaves."

* A longtime outdoors columnist is calling it a career. We talk with Dale Bowman.

* Peter Medlin introduces us to the first group of Illinois "math stars."

* An Illinois man will be part of a skydiving group trying to break a worl

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