A pair of newly identified comets are jointly appearing in the October sky, and it’s possible to see both — if you know where to look and when.

The semi-annual Reuse-a-Palooza at The Plant is happening Sunday, a one-stop shop for recycling, repairing and repurposing items that would otherwise go to waste.

The case of mistaken identity was revealed in a scientific paper published Wednesday in the Royal Society journal Biology Letters.

Ever seen a tree that looks like its leaves have sprouted warts or are suffering from a really bad rash? Welcome to the wild, wonderful world of plant oddities known as galls.

The work by Mary E. Brunkow, Fred Ramsdell and Dr. Shimon Sakaguchi uncovered a key pathway the body uses to keep the immune system in check, called peripheral immune tolerance. Experts called the findings critical to understanding autoimmune diseases such as Type 1 diabetes, rheumatoid arthritis and lupus.

There are a number of local fall forecast resources that will point you in the direction of peak color.

These cuts are likely to affect battery plants, hydrogen technology projects, upgrades to the electric grid and carbon-capture efforts, among many others, according to the environmental nonprofit Natural Resources Defense Council.

September in Chicago felt like a continuation of summer, with above-normal temperatures. But the real story was the lack of rain.

Jane Goodall, the groundbreaking scientist and humanitarian famous for studying wild chimpanzees in East Africa has died at age 91. In 2010, Goodall visited “Chicago Tonight.”

Chicago is famous for its skyscrapers, but landscape architects have played an equal role in shaping the city. Experts will lead tours of dozens of open spaces Saturday and Sunday.

Jane Goodall, the conservationist renowned for her groundbreaking chimpanzee field research and globe-spanning environmental advocacy, has died. She was 91.

Harrison Ford is one of the most famous people on the planet. David Willard has spent a career and his retirement cataloguing dead birds. Both will be recognized as conservation superstars during October’s Half-Earth Day event at the Field Museum.

The invasive spotted lanternfly appears to be making inroads in Chicago. So far, there have been more reports of the bug in September 2025 alone than there were in all of 2024.

Half a billion birds will be on the move across the U.S. tonight as migration begins to hit its peak, with some 25 million expected to pass over Illinois, putting the entire state on high alert to reduce collision risks.

The Chicago River has proven itself fit for swimming. But what about raising a family? No one’s ever tallied the number of larval fish in the waterway, until now.

The Illinois Department of Natural Resources has announced nearly $1 million in grants to support stewardship activities in natural areas across the state. Organizations in Cook, Lake and McHenry counties were among the recipients.