The CTA started experimenting with electric buses in 2014 and plans to move to an all-electric fleet by 2040. But as the temperature drops, lithium-ion batteries that run the buses aren't as efficient and lose range.

Over the course of 23 years, the Cook County Coyote Project has tracked the movements of nearly 1,500 coyotes. 

Chicago will dodge the worst of a storm system whose track has stymied meteorologists as it's approached the region.

At some point Friday, it will probably rain or snow, but how much of which form of precipitation will fall, and where, forecasters still can’t say with confidence.

The 191-foot cargo vessel collided with a grain hauler on a blustery night in September 1894, sinking both. The Ironton’s captain and six sailors clambered into a lifeboat but it was dragged to the bottom before they could detach it from the ship. Only two crewmen survived.

The big story was the amount of rain that fell in the Chicago region: There have only been seven wetter Februarys since 1871.

In what’s being dubbed a celestial “kiss,” Jupiter and Venus will appear to nearly touch Wednesday.

At least two brief tornadoes touched down in the Chicago suburbs Monday — one in Joliet and another on the far north side of Naperville. 

It’s National Invasive Species Awareness Week. Think you would know an invasive species if you saw one?

The cubs, born Jan. 9, received their first health checkups this week, allowing the zoo's veterinary staff to confirm all the youngsters are male.

Forest Preserve District staff and volunteers have been keeping a close eye on the nests of two mated pairs of eagles and recently confirmed that at least one of the couples is sitting on eggs.

A new report highlights several supply-and-demand conundrums and makes recommendations for how to increase native seed production.

The Metropolitan Water Reclamation District treats stormwater and wastewater for more than 5 million people in Cook County. One of the methods to treat that water is a surprising way to reuse a byproduct from the creation of a very popular beverage: locally brewed beer.

The Environmental Protection Agency told Norfolk Southern to take all available measures to clean up contaminated air and water, and also said the company would be required to reimburse the federal government. 

It’s been months since the Chicago Park District discovered the National Museum of Puerto Rican Arts and Culture started construction on an unauthorized building in Humboldt Park. The half-finished cement box is still there. Is there an end in sight?

A San Francisco-based tech startup has announced the launch of the latest tool in the fight to stave off the worst of climate change: genetically modified trees.