It’s been 120 years since New York ornithologist Frank Chapman launched his Christmas Bird Count as a bold new alternative to what had been a longtime Christmas tradition of hunting birds.

What will the world look like in 20 years if climate change goes unchecked? That’s the premise of “2040 A.D.,” a new collection of short stories that fall under an emerging literary genre known as climate fiction. 

An update on the mission and findings of NASA’s Parker Solar Probe, named after pioneering University of Chicago astrophysicist Eugene Parker, who first proposed the existence of the solar wind in 1958.

Two Chicago Park District workers escaped without serious injury after the salt truck they were navigating along an icy lakefront bike path slid into Lake Michigan on Wednesday morning.

This year’s devastating losses are forcing tough decisions about the future of farming in America’s flood plains, even among those skeptical of climate change and humans’ role in it.

As winter weather arrives, Chicagoans can seek refuge from the cold at 113 public buildings designated as warming centers. 

The computer models used to simulate what heat-trapping gases will do to global temperatures have been pretty spot-on in their predictions, a new study found.

The city’s annual winter overnight parking ban goes into effect early Sunday and continues through April 1, 2020. Here’s what you need to know.

In 2003, the Illinois Environmental Protection Agency had 1,265 employees. By 2018, that number had fallen to 639, according to a new report that a former IEPA director describes as “both a wake-up call and call to action.”

A storm dumping heavy snow buried highways in Colorado and Wyoming Tuesday. Blizzard and wintry weather warnings extended into the Great Lakes states with the storm expected to bring high winds and snow to Michigan, Minnesota and Wisconsin.

Dan Hooper spends his time contemplating the biggest mystery of all: how the universe came to be. He joins us to discuss his book, “At the Edge of Time: Exploring the Mysteries of our Universe’s First Seconds.”

Can old dogs teach us new tricks? Scientists are looking for 10,000 pets for the largest-ever study of aging in canines. They hope to shed light on human longevity too.

Sport fish have declined significantly in portions of the Upper Mississippi River infested with Asian carp, adding evidence to fears about the invader’s threat to native species, according to a new study.

An arctic air mass that brought snow and ice to an area stretching from the Rocky Mountains to northern New England on Monday was poised to give way to record-breaking cold temperatures.

Whether it’s used comically or in connection with serious topics, a new internet meme may be underscoring deeper generational divides. 

While it’s still technically fall for another six weeks, you wouldn’t know it by looking outside. WGN meteorologist Demetrius Ivory tells us what’s ahead.