After a successful inaugural event in 2025, the Chicago River Swim is coming back in September, officials announced.

Last November, the Trump administration proposed a stricter definition for “Waters of the United States,” excluding seasonal streams, marshes, bogs, swamps and mangrove forests from protection under the 1972 Clean Water Act.

“This little fish is truly one in a million,” said Jenny Richards, senior aquarist at Shedd Aquarium.

Severe thunderstorms are expected throughout northeast Illinois late Tuesday afternoon into the evening, bringing with them the threat for damaging hail and winds, flash flooding and possible tornadoes south of the I-80 corridor.

The full story is now being told of how a tiny clump of moss helped investigators crack the macabre case of grave robbing at Burr Oak Cemetery.

Inside the Department of Behavioral Sciences at the University of Illinois Chicago, a dedicated team of researchers is working to solve decades-old mysteries by locating and identifying the remains of missing American service members who never made it home from war.

A recent executive order by Gov. JB Pritzker set a new goal to begin development on new nuclear power plants by 2033, with the intention of bringing online enough energy to power up to 2 million Illinois homes.

Winter in Chicago recorded far less snow than normal, and temperatures for the season were close to normal despite January’s deep freeze.

Early risers will enjoy views of a total lunar eclipse in the pre-dawn hours on Tuesday.

Lurie Garden will be closed to the public beginning Monday through early July while major repairs are made to the garden’s water feature and boardwalk.

It’s always summer in the Chicago Botanic Garden’s arid greenhouse, where the view is unlike anywhere else in the world.

Last week, the Trump administration delivered a catastrophic blow to U.S. climate policy by repealing the longstanding scientific finding that planet-warming pollution poses a danger to humans. Now comes the yearslong race through the courts.

Lincoln Park Zoo is celebrating a baby boom of nine eastern massasauga rattlesnakes, the first new arrivals of this federally threatened native species in nearly a decade.

Brookfield Zoo has announced the arrival of a new pangopup — a baby white-bellied pangolin — just in time for World Pangolin Day on Saturday.

The unique size and shape of the bones from Spinosaurus mirabilis — the first Spinosaurus species discovered in over a century — gives important clues to the history of spinosaurids on Earth.

Vehicles across the city were coated in dirt Wednesday thanks to a perfect storm of events.