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On Thursday, the Illinois Environmental Council released its Environmental Scorecard, highlighting the top pieces of environmental legislation (and legislators) from 2016. 

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(Justin Hobson / Wikimedia Commons)

The increasing frequency of tornadoes, and a new study on gun violence. Those stories more from the world of science with Rabiah Mayas.

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The decadeslong fight to clean up the Chicago River took a step forward last week with the resolution of two lawsuits targeting phosphorous discharge that has polluted waters from Chicago to the Gulf of Mexico.

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(Daniel Dionne / Flickr)

Dozens of Chicago activists met last week to plan a defense of environmental policies that appear vulnerable under the administration of President Donald Trump.

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Peggy Notebaert Nature Museum's alligator snapping turtle, Patsy McNasty, moved into a bigger tank Jan. 19. (Alex Ruppenthal / Chicago Tonight)

Alligator snapping turtle Patsy McNasty moved into a new 300-gallon tank this week at Chicago's Peggy Notebaert Nature Museum, where visitors attended a “housewarming” event for the 14-pound turtle. 

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A regal fritillary butterfly, a local species that’s classified as threatened in Illinois.

Over the course of its history, the Peggy Notebaert Nature Museum has amassed a collection of about 390,000 animal specimens and artifacts. We get a close look at five of these rarely seen items.

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Pollution causes 10 million deaths per year, according to an upcoming report written by 50 researchers and policymakers, including Chicago-based energy experts.

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Eugene Cernan (NASA / Facebook)

The Chicago native died Monday afternoon at the age of 82.

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Cook County Board President Toni Preckwinkle

Cook County is ahead of schedule on its goal to reduce greenhouse gas emissions 80 percent by 2050, a new report shows.

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Amazon Echo (Adam Bowie / Flickr)

Amazon’s voice-activated digital assistant is a hot seller, but there are privacy issues.

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Why did the Trump transition team target Department of Energy staffers who worked on climate change? What does the future hold for climate research and nuclear weapons? A one-on-one interview with the current U.S. Secretary of Energy.

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(Chicago Tonight)

Chicago’s air traffic controllers and the pilots they guide have a new way of communicating that officials say will improve speed and safety. We explain how it works.

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While many people may think that art and science have little overlap, an annual competition at Northwestern University proves that groundbreaking research can produce striking images.

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(Chicago Tonight)

Why aren't Chicagoans getting on the recycling bandwagon? What city officials are doing to reverse dropping participation rates.

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The animal welfare team at Brookfield Zoo tends to Zenda, a 10-year-old male lion who appeared to have a toothache. (Chicago Tonight)

What happens when a lion gets a toothache? Meet the large and dedicated team that cares for more than 3,000 animals at Brookfield Zoo. 

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Charles Darwin

More than 150 years after Charles Darwin published "On the Origin of Species," the man and his theories continue to generate controversy and debate. That academic battle plays out in a new book titled "Debating Darwin."