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. 

Why are there so many long-eared owls showing up in Chicago this winter? Bird watchers call it an “irruption.”

Chicago will depend on residents to help enforce the city’s updated recycling ordinance – at least initially. The changes, which took effect Jan. 1, mark the first update to the city’s recycling rules in 20 years.

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.

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

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

Thanks to a new state law, officers partnered with a police dog are first in line to keep the dog once it is deemed no longer fit for service.

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

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

Organized by the nonprofit Center for Biological Diversity, Earth2Trump is a series of rallies aimed at building “resistance to all forms of oppression and all attacks on the environment,” the group states.

As the holiday season winds down, it’s about time to take care of that Christmas tree that has begun to decay in your living room.

The newborn female Bornean orangutan joins five other orangutans living at the Brookfield Zoo.

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.

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.

There are many Christmas traditions, but one that is especially beloved by people who love birds is the annual Christmas Bird Count. Learn more.

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