Nearly 30 years ago, scientists began collecting semen samples from Mexican wolves. On Sunday, Brookfield Zoo artificially inseminated one wolf as part of an effort to boost the genetic health of the endangered species. 

How feasible is raising livestock in the city? An urban agriculture advocate weighs in.

A coalition of environmental advocacy groups in Illinois hopes to put the brakes on a Rauner administration proposal that would relax pollution rules for eight downstate coal plants owned by Dynegy Inc.

Football players are often thought of as modern-day gladiators, but even the most hard-headed linebacker has nothing on the woodpecker, at least when it comes to sustaining blows to the noggin. 

The grocery store chain says it is evaluating its supply chain “to see where additional change is needed” in response to public concerns over pork suppliers who confine pigs to tight metal crates.

The Chicago-based fast food chain agreed last year to work toward phasing out antibiotics from its beef and pork products. An Illinois nonprofit now wants McDonald’s to commit to a timeline to meet that goal.

If the skies over Chicago cooperate over the next 12 hours, the moon will offer a very rare triple feature. 

China’s landmark cloning of primates has some worried it sets a dangerous precedent. We discuss the breakthrough – and what it could mean for the future of cloning.

For first time since the height of the Cold War, the hands of the Doomsday Clock, a symbolic indicator of how close we are to a global catastrophe, have been moved to 11:58 p.m. This is the closest the clock has been to midnight since 1953.

Wednesday’s “super blue blood moon” marks the convergence of three lunar events, but it will hardly be visible to viewers in Chicago. 

ComEd should be allowed to proceed with plans to build a first-of-its-kind microgrid in Chicago’s Bronzeville neighborhood, a state legal authority said this week. But environmental and consumer advocates aren't satisfied with the project. 

President Donald Trump’s new tariff on imported solar panels will slow – but not stop – the growth of Illinois’ solar industry, experts say, thanks in large part to the state’s recently passed clean energy law.

The city’s lawsuit comes a week after attorneys at the University of Chicago filed their own lawsuit against the steel corporation. “This Great Lake is our most precious natural resource and we must preserve and protect it,” Mayor Rahm Emanuel said in a statement.

The group Crate Free Illinois is calling on Trader Joe’s to stop purchasing pork from suppliers that use gestation crates, tight metal stalls that keep pigs in one position for the majority of their lives.

The latest social media craze of matching your face with faces in works of art left Chicagoans out in the cold, thanks to Illinois’ strict laws on biometric data. Do these rules keep us safe or leave us behind?

Ramar, one of the oldest gorillas in the country, celebrated a milestone birthday this month with a frozen “cake” filled with fruit and raisins.