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We live in a digital world. We communicate with each other through tweets and Facebook posts, upload photos to Instagram, pay our bills online, and more. But what happens to all those digital files and accounts after we die? We discuss planning for your digital afterlife.

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Some $500 billion is spent each year by governmental entities on information technology. Now so-called “civic hackers” are taking the vast troves of data that cities like Chicago collect, and designing apps to make that data more useful to the public. From apps that track food poisoning to potholes to parking -- the city of Chicago is leading the way in the growing "govtech" sector. We find out more.

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Chicago’s technology incubator, 1871, seeks public funding to expand for the second time in a year, following a 25,000 square foot expansion last year. The potential state-backed expansion concerns privately run co-working spaces and offices that rival 1871. We hear the latest from Crain's Chicago Business reporter John Pletz. 

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Scott Flansburg is in the Guinness Book of World Records as the “Fastest Human Calculator.” Flansburg correctly added a randomly selected two-digit number (38) to itself 36 times in 15 seconds without the use of a calculator. Flansburg shares his gift and love of math with children all around the world. He joins Chicago Tonight to put our own calculator to the test.

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J.B. Spector/Museum of Science and Industry, Chicago

Chicago's Museum of Science and Industry premieres a new national touring exhibit, Robot Revolution, that explores how robots, created by human ingenuity, will ultimately be our companions and colleagues, changing how we play, live, and work together. We get a preview from one of the exhibit’s creators.

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When it comes to treating our sewage, Chicago has a history of thinking big from reversing the flow of the Chicago River to the creation of Deep Tunnel. Jay Shefsky visits the Thornton Quarry and goes to the bottom of Deep Tunnel to see where the water will flow into the new reservoir later this year.    

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Scientist Neil Shubin is back to tell us why the U.S. Military is so interested in the bombardier beetle, why taking a hands-on approach is a better way to learn science, and why astronomers may want to avoid using the microwave when heating their lunch.

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In 2011, the Chicago Park District bought 20 acres of land on the city's north side. The plot of land had sat unused and untended for many years. Nearly four years later, work on the nature preserve is moving quickly with a scheduled unveiling set for this summer. We get a preview.

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One in five parkway trees in Chicago is threatened by the Emerald Ash Borer beetle. So what can people do to stop the shrinking of the region's tree canopy? The Morton Arboretum's CEO, Gerry Donnelly, joins us to talk about reversing tree loss.

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The 25th anniversary of the Hubble telescope is this month, scientists find a potential breakthrough in our understanding of Alzheimer's disease, and the likelihood of finding life on Mars just went up. Rabiah Mayas, Director of Science and Integrated Strategies at the Museum of Science and Industry, rounds up the top local and international science news.

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Gov. Bruce Rauner declared DeKalb and Ogle counties state disaster areas after severe thunderstorms and tornadoes tore through the area Thursday. At least two people were reported dead in DeKalb County and dozens were injured.

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In advance of airing Power to the People tonight, we speak with Johan Norberg, a senior fellow at the Cato Institute, about supplying energy to developing nations.

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The EPA has awarded more than $8 million in grants to combat invasive species in the Great Lakes. We talk with the Shedd Aquarium's Phil Willink about the $100 million a year invasive species problem.

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An Adler Planetarium astronomer tells us whether earthlings may, at long last, be hearing from other intelligent life in the universe.

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Ohio State University biologist Stanley Gehrt has followed more than 800 coyotes in Chicago over the past 15 years using GPS tracker collars. Where they turn up might just surprise you. Gehrt joins us to discuss Chicago's thriving urban coyotes.

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Historian Alice Dreger's new book, Galileo's Middle Finger: Heretics, Activists, and the Search for Justice in Science, is a funny, surprising story of Dreger's career as an activist, researcher, and advocate for evidence-based activism. She joins us.