For the first time, an international team of scientists has been able to successfully grow monkey embryos containing human cells, sparking fears of human-monkey hybrids. We go behind the headlines to understand the science.

The big reveal is still nearly a year away, but the city has shared teaser images of the work in progress on the Tiffany glass dome and decorative finishes in the Grand Army of the Republic Memorial Hall.

President Joe Biden convened leaders of the world’s most powerful countries on Thursday to try to spur global efforts against climate change.

After celebrations were scratched in 2020 due to the coronavirus pandemic, Earth Day is back in 2021 with in-person events designed to raise awareness of environmental issues.

At numerous natural areas across the forest preserve district, low-lying “spring ephemeral” plants are flowering in the kind of sunlight they haven’t enjoyed in decades, thanks to ecological restoration projects.

“Wild Color,” making its debut in October, will immerse visitors in all the colors of nature, while returning fan favorite “Biomechanics: The Machine Inside” will explore the engineering behind the bodies of humans and animals.

With temperatures expected to dip below freezing, gardeners who jumped the gun might want to consider covering tender vegetation, according to experts.

Friends of Illinois Nature Preserves was founded last year to increase support for and restoration of the state’s most precious lands, which boast more biodiversity than the Grand Canyon and are more endangered than the Great Barrier Reef.

NASA’s experimental helicopter Ingenuity rose into the thin air above the dusty red surface of Mars on Monday, achieving the first powered flight by an aircraft on another planet.

With its cherry trees finally in full bloom, thousands of people have been flocking to Jackson Park daily. But hurry, the breathtaking blossoms won’t last for long.

A federal judge denied a motion Wednesday that would have prevented city officials from issuing the final permit needed by General Iron to set up operations on the Southeast Side. 

In a listing of the top 25 botanical gardens in the U.S. and Canada, as compiled by Yelp, the conservatory claimed the top spot. The Chicago Botanic Garden, also made the list, coming in 12th.

Preliminary results from two experiments suggest something could be wrong with the basic way physicists think the universe works, a prospect that has the field of particle physics both baffled and thrilled. 

Just because a baby animal is spotted on its own doesn’t mean it’s been abandoned or orphaned. Before “rescuing” the critter, call the experts.

Conservationists are celebrating a big win for wildlife along Chicago’s lakefront, where the expansion of a “treasured” natural area will give more room to some high-profile occupants: a pair of endangered Great Lake piping plovers, Monty and Rose.

It’s easy to forget the cruelest April Fool’s joke: The season’s last frost is likely several weeks away, meaning it’s far too early to put most plants in the ground.