Data center projects around Illinois are expected to generate millions in taxes, which contribute to schools and city services. There are leaders who question whether the benefits make up for increased energy prices and water use.

For the first time in more than 100 years, a bald eagle has been born inside the city’s limits, the Chicago Park District announced Wednesday.

Most birds migrate over Chicago at night. A new network of acoustic monitors is tracking their movements by listening for what can't be seen.

Officials with Chicago's Department of Environment recently released an updated Green Infrastructure Strategy, the first revision to the document in more than a decade.

Monitors have confirmed that for the third year running Sea Rocket has returned to Montrose and Blaze is back at Waukegan.

Water supplies vary across the state because different regions rely on different sources, and some water is easier to access than in other regions.

Pepper has been spotted on a Waukegan beach, where he and mate Blaze nested in 2024 and '25.

Isle Royale in far western Lake Superior between Grand Marais, Minnesota, and Thunder Bay, Canada offers scientists a rare opportunity to observe wolves and moose largely free from human influence.

The annual City Nature Challenge has rolled around again, and everyone's invited to join the effort to boost the Chicago region's standing in this friendly global competition.

Lincoln Park Zoo’s baby Eastern black rhino is ready to meet her adoring public.

Since March, multiple rounds of severe storms have caused flooding, plus hail damage and even tornadoes. A warmer atmosphere can hold more moisture, and that moisture can turn into rainfall.

What kind of outdoorsman leaves Colorado for Illinois? Six months into his tenure as general superintendent with the Forest Preserve District of Cook County, Adam Bianchi still gets asked that question.

NASA’s 10-day Artemis II mission showed off the rigor and precision that has made the agency a household name.

A bird-friendly building ordinance has once again been introduced to the Chicago City Council — the second time such legislation has been brought before City Council since 2019 — but advocates fear the measure was dead on arrival.

The Chicago Harbor Lock was built in the 1930s as part of the project that famously reversed the flow of the Chicago River. WTTW News explains.

Thunderstorms dumped 2.43 inches of rain at O'Hare Airport, Chicago's official weather station.