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It raked in nearly $250 million in its first weekend, garnering critical acclaim along the way. "Star Wars: The Force Awakens" is well on its way to becoming the highest-grossing movie of all time. Tonight, we revisit a 2013 "Chicago Tonight" report that introduced viewers to the Chicago computer scientists who helped make some key special effects in the very first "Star Wars" movie.

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We talk with an Al Jazeera correspondent about being on the ground in Ferguson and the impact police presence is having on protesters and the press. 

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Thirty-six years ago, Star Wars exploded onto the screen and made cinematic history. The blockbuster film began what would become a multi-billion dollar empire for George Lucas, and spawned companies like Industrial Light & Magic, and Pixar. We revisit Ash-har Quraishi's story of how Chicago played a pivotal role in sci-fi cinematic history. Read an article, view a slideshow, and watch web extra video.

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A food additive that has been used for decades is stirring up controversy. We talk with a Chicago researcher who is in the midst of clinical trials to uncover its potential hazards. Read an article about carrageenan.

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Computer scientists are partnering with physicians to take next-generation virtual reality to the extreme. We revisit Ash-har Quraishi's exploration inside the CAVE2 in tonight's edition of Scientific Chicago. Read an article and view a slideshow.

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Ash-har Quraishi has the story of how Chicago played a pivotal role in sci-fi cinematic history.

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A food additive that has been used for decades is stirring up controversy. We talk with a Chicago researcher who is in the midst of clinical trials to uncover its potential hazards. Ash-har Quraishi has the story in tonight's Scientific Chicago.

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Computer scientists are partnering with physicians to take next-generation virtual reality to the extreme. Ash-har Quraishi goes inside the CAVE2 in tonight's edition of Scientific Chicago.

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In tonight's Scientific Chicago, Ash-har Quraishi takes a look at a recent scientific study that delves deep into what happens as we recall events from our past.

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Could the secret to good health and combating disease rest in the gut? We revisit Ash-har Quraishi's story about an unusual procedure that could provide some answers.

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Changing the way medicine targets cancer. Could doctors one day kill cancer cells without the use of drugs or chemotherapy? Ash-har Quraishi spotlights some promising research in tonight's edition of Scientific Chicago.

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Could the secret to good health and combating disease rest in the gut? In tonight's Scientific Chicago, Ash-har Quraishi tells us about an unusual procedure that could provide some answers.

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For decades the national emblem had been endangered, but for some lucky bird lovers catching a glimpse of this majestic animal is just a matter of looking out the window. We tell you where you can spot the great American Bald Eagle.

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A multimillion dollar public-private partnership has attracted donors from all over the world. We show you how it's breathing new life into old athletic fields.

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Bee hives, hand cream and O'Hare Airport. We show you how one social enterprise is utilizing the sweet nectar of honey to give its employees a fresh start.

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A multimillion dollar public-private partnership has attracted donors from all over the world. We show you how it's breathing new life into old athletic fields.