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.

Air from Siberia — yes, Siberia — is heading toward a huge chunk of the United States and it could set record-low temperatures from Texas to New England.

If you woke up Thursday to a weird text that seemed totally out of place, you aren’t alone. A mysterious wave of missives swept America’s phones overnight, delivering largely unintelligible messages from friends, family and the occasional ex.

Secretary of State Mike Pompeo on Monday touted America’s carbon pollution cuts and called the Paris deal an “unfair economic burden” to the U.S. economy.

In a world in which scientific literacy is often lacking, the online platform Zooniverse.org is doing what it can to encourage “people-powered research.”

A 67-acre Southeast Side site served as a dumping ground for Republic Steel for nearly 30 years. Inspection records show the property is contaminated with lead, cyanide, mercury and other potentially harmful pollutants. 

Emmanuel Pratt will use a South Side community farm he developed as a “living laboratory” to teach students about contemporary sustainability initiatives. 

The tech giant says its computer took a problem that a normal supercomputer would take 10,000 years to solve and figured it out in just over three minutes. What might this the brave new world of quantum technology deliver?

Inside a barn about 60 miles southwest of Chicago, six giant pumpkins are hoisted by forklift onto an industrial scale and weighed, one by one, so their growers can claim cash prizes for the heaviest – and bragging rights.

Northwestern researchers studied the careers of young scientists and found that failure early in one’s career leads to greater success in the long term – at least for those who stick with it.  

A 4-pound chunk of a rare type of meteorite that crashed into a Costa Rican village this spring has found its way to Chicago, and experts say the rock likely contains clues to the origins of life on Earth.

The state has recognized a 169-acre section of Harms Woods, which is home to 400 different plant species, as an official state nature preserve, the highest level of protection for land in the state.

Ten business leaders are behind the donation – the largest cumulative gift in the university’s history – which will fund scholarships and new campus facilities.