(Jacub Gomez / Pexels)

Looks like we’re going to have to come up with replacements for terms like “starstruck” and “starry-eyed.” Scientists say the visibility of stars is rapidly fading as light pollution increases.

Many fish in the study contained more than 8,000 parts per trillion of PFOS, a known toxin phased out by the federal government. (Adobe Stock)

PFAS are called "forever chemicals" because they fail to break down easily in the environment. Chemicals leach into the nation's drinking water and accumulate in the bodies of fish, shellfish, livestock, dairy and game animals.

(Patty Wetli / WTTW News)

The board will help ensure the growth, maintenance and health of Chicago’s tree canopy for generations to come, officials said. The group’s first meeting could come as early as February.

(WTTW News)

With temperatures averaging in the mid to high 30s, Chicago is seeing its fourth warmest January on record. Climatologist Trent Ford said the only years that were warmer were 1880, 1939 and 2006.

(City of Chicago)

The Department of Streets and Sanitation has announced the 50 finalists in the contest. Voting is open to Chicago residents through Jan. 31.

A mountain lion, also known as a cougar, puma or panther. (Nicky Pe / Pexels)

Remember the pair of mountain lions (aka cougars, aka pumas, aka panthers) that wandered into Illinois last fall? Scientists say folks east of the Mississippi should expect more of such sightings.

(Andreas Hoja / Pixabay)

January and February are prime months for bald eagle watching in Illinois, with some 3,000 of the raptors hanging out in the state during the winter.

Promontory Point, on the south lakefront, is beloved for its natural aesthetic, designed by noted landscape architect Alfred Caldwell in 1937. (Preservation Chicago / Eric Allix Rogers)

Supporters of Promontory Point can breathe a sigh of relief that the peninsula's much loved stair-step limestone wall is poised, finally, to become protected from attempts to replace it with concrete.

Promontory Point, on the south lakefront, is beloved for its natural aesthetic, designed by noted landscape architect Alfred Caldwell in 1937. (Preservation Chicago / Eric Allix Rogers)

The road to city landmark status for Promontory Point starts at Thursday’s meeting of the Commission on Chicago Landmarks. Supporters have been fighting to protect the lakefront peninsula for more than 20 years.

(Dan Bartlett / NASA)

According to NASA, the comet would last have been seen in the night sky more than 10,000 years ago — millennia before the birth of human civilization — and it may never pass this way again.

A view of the Suncor Energy oil refinery in Commerce City, Colo., on Nov. 23, 2020. (Rachel Ellis / The Denver Post via AP, File)

The funding, established through the 2022 climate and health law signed by President Joe Biden, marks the largest environmental justice grants the agency has ever offered.

Zari, just days before giving birth. (Lincoln Park Zoo / Twitter)

Lincoln Park Zoo announced it welcomed not one, not two, but three lion cubs on Monday. The zoo had been on lion watch since early December, when staff confirmed 4-year-old African lion Zari was pregnant.

(Patty Wetli / WTTW News)

The six recommended appointees to the board, which was created in June 2021, all received unanimous support during a key committee hearing. Next up is a full Chicago City Council vote.

Jim Tibensky, a volunteer with Chicago Bird Collision Monitors, nudges a bald eagle to shore New Year's Day in Waukegan Harbor. (Courtesy Nat Carmichael)

"Despite promising signs of recovery the first 48 hours, the bird took a very rapid turn for the worst," Willowbrook Wildlife Center shared on social media.

(U.S. Fish and Wildlife Service Midwest Region)

A GPS collar allowed researchers to track the wolf from Michigan all the way to Manitoba, Canada. That's just one of the wild stories we followed this week.

(Lisa Fotios / Pexels)

Live trees — well, not so live anymore — can be recycled at any one of 26 citywide locations, Jan. 7-21.