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Caltech Astrophysicist Mike Brown was one of the scientists who, in 2006, led the successful crusade to get the former planet Pluto downgraded to the status of dwarf planet. He joins us to discuss what he's found far, far away in our solar system.

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Author Steve Levine had fly-on-the-wall access for two years to "the battery guys" at Argonne National Laboratory -- America's team in an international competition to build a battery that will change the world. Levine joins us to talk about his new book, The Powerhouse.

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It's cold. Really cold. WGN's Chief Meteorologist Tom Skilling tells us if we are heading towards record-breaking weather.

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There are bison once again roaming Illinois prairies. It's been more than 175 years since the last wild bison died in this state, but as of October they are back, thanks to The Nature Conservancy project in western Illinois called Nachusa Grasslands. Chicago Tribune photographer Anthony Souffle has been covering the new Illinois bison and the restoration of the prairie on which they graze. When he returned recently to see their progress, Jay Shefsky tagged along.

Dogs, Mini-Mammals, Crowd-Sourcing & the Planet's Inner Core

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What can ancient dogs tell us about early human migration to the Americas? And how are scientists using earthquakes to scan our planet's inner core? University of Chicago paleontologist Neil Shubin joins us with a roundup of local science news.

The Unusual Mating Rituals of the Animal Kingdom

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Credit: Christopher Drake

The Lincoln Park Zoo is putting on a Valetine's Day-themed after hours event that delves into the unusual mating habits and reproductive traits of the animal kingdom. Jay Shefsky spoke with the zoo's general curator, Dave Bernier, about some of their animals' perplexing courtship rituals.

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As water is increasingly recognised as a precious resource, we look at Chicago's water future.

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It has been thought that almost nothing can survive in the watery depths near the South Pole. But a group of researchers sent a robot armed with a camera a half-mile below Antarctic ice and discovered an entire ecosystem. It is the farthest south that fish have ever been found. 

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The hands of the Doomsday Clock, a symbolic indicator of how close we are to a global catastrophe, have been moved to the 11:57 position. Kennette Benedict, executive director of Bulletin of the Atomic Scientists, explains her publication's decision to move us closer to midnight.

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Drones have been a hot topic in the media nationwide with the FAA working to catch up with the technology and a drone landing on White House property this week. What are the current regulations in Chicago and Illinois? We discuss drones with our panel.

Ocean Extinction, Conception Sparks, Brain Generosity & Epilepsy

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Our science guy, Neil Shubin, talks about the latest science stories, including a study on the health of the world's oceans, why sparks really do fly at the moment of conception, and a new study finding that generosity can be "written" in the brain.

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NASA astronaut Col. Mike Hopkins belongs to the very exclusive group of just 215 people who have visited the International Space Station (ISS). But Col. Hopkins distinguished himself during his time on the ISS in a couple of memorable ways. We revisit a conversation with Hopkins.

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A NOVA special called Big Bang Machine about the Large Hadron Collider airs at 9:00 pm Wednesday on WTTW11. Don Lincoln, one of the top scientists from the documentary, joins us to discuss the role of Fermilab -- located just outside of Chicago -- in the experiments at CERN in Switzerland.

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Chicagoans are bracing for a wintry week to start off the first full week of the New Year. Send us your severe weather photos here.

Paleontologists Discover Largest Predatory Dinosaur

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Image from the October edition of National Geographic magazine.

We revisit our conversation with the scientists behind the discovery of Spinosaurus, the largest predatory dinosaur ever found.

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We revisit a conversation with Marius Stan, an Argonne scientist, who came to have a recurring part in the hit TV series Breaking Bad.