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Whether you’re a night owl or an early bird, your sleep is regulated by your circadian rhythm. A sleep expert helps unravel the mystery of our internal clock.

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An artist’s impression of gravitational waves generated by binary neutron stars. (Credits: R. Hurt / Caltech-JPL)

The Nobel Prize committee called it “a discovery that shook the world.” A local scientist explains gravitational waves.

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(© Shedd Aquarium / Brenna Hernandez)

Since embarking on a new sustainability initiative, Shedd Aquarium has cut annual water use by more than half, from 60 million gallons in 2012 to 28 million gallons today.

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The race to create self-driving cars is heating up. One automaker has taken a significant step towards a hands-free future with a model that will soon be available in the Chicago area.

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(Basil Greber / University of Chicago)

A new study suggests that Earth’s tectonic plates began moving 3.5 billion years ago – about half a billion years earlier than previously thought.

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(Kārlis Dambrāns / Flickr)

Scientists around the world are working to develop the next generation of batteries. We speak with one who is leading the charge at Argonne National Laboratory.

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(Joel Wintermantle / University of Chicago)

A public art installation along the Chicago River aims to bring the realities of climate change in Antarctica to Chicago. 

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While recent hurricanes have been devastating parts of the Earth, some major activity has also been taking place at the center of our solar system.

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(Courtesy Chicago Mayor's Office)

A new analysis of citywide carbon emissions data shows that Chicago is 40 percent of the way to meeting emission reduction targets set under the Paris climate deal. 

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(Albert Kok / Wikimedia Commons)

While little is known about the typically solitary lives of octopuses, new evidence out of Australia suggests that octopuses can congregate and socialize under the right conditions.

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From left: Marie Curie, Christina Ciecierski and Julie Des Jardins (Courtesy Northeastern Illinois University)

Honoring the 150th anniversary of the birth of physicist Marie Curie and its own 150th anniversary, Northeastern Illinois University this month hosts a conference celebrating women’s contributions to science. Find out what’s on tap.

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NASA’s Cassini spacecraft is shown during its Sept. 15, 2017, plunge into Saturn’s atmosphere in this artist’s depiction. ( Credit: NASA / JPL-Caltech)

The Cassini mission has completely transformed our understanding of Saturn and identified two moons that could potentially harbor life. On Friday morning, the journey will come to a fiery end. 

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What part – if any – does global warming play in the intensity of hurricanes? And what infrastructure failures contribute to the utter loss and destruction during extreme weather?

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After heavy storms, the Chicago River’s North Branch floods hundreds of homes on the Northwest Side. The Chicago Department of Transportation is now constructing a permanent flood-fighting weapon. We take a look.

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(Alex Ruppenthal / Chicago Tonight)

Instead of dumping it in landfills, organic waste could be used to power cars, heat homes and potentially reduce the need for new landfills in the U.S., according to research by Argonne National Laboratory.

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(Mark Lopez / Argonne National Laboratory)

New technologies that could change the way we live and work will be on display this month during a reality TV-inspired competition sponsored by the U.S. Department of Energy.