The American Lung Association’s annual “State of the Air” report found that Chicago has experienced an increase in days with spikes of ozone-polluted air.
Stories by Alex Ruppenthal
By tracking the types, frequency and intensity of frog mating calls, experts hope to gauge the success of conservation efforts in an area commonly referred to as the city’s dumping ground.
Staff made the decision to euthanize the North American river otter pup after his health declined over the weekend. “This was an enormously hard decision to make,” said Bill Zeigler of the Chicago Zoological Society.
A pair of bills would strip the state of its authority to regulate endangered species that are protected at the federal level but that might require further protections within Illinois.
Staff at the zoo are caring for the pup because his mother was unable to provide him with proper nourishment. His arrival in February marked the zoo’s second successful birth for this once-endangered species.
A groundbreaking study concludes that human health can be “mostly sustained” for a year in space, a key finding that figures to help NASA with its mission of sending humans to Mars within two decades.
The non-binding measure is being celebrated by environmental advocates, who note that Chicago is now the largest U.S. city to announce a timeline for obtaining all of its energy from renewable sources.
The city’s gleaming skyline and its position along a busy migratory corridor make it the most dangerous in the U.S. for birds traveling north and south each fall and spring, a new study finds.
The zoo is no longer offering a program that allowed visitors to touch or interact with a handful of different animals, citing research showing that some animals display signs of stress after being handled by humans.
After teasing social media by announcing the discovery of “unprecedented” dinosaur fossils under a Michigan Avenue storefront, the Field Museum unveiled a new pop-up exhibit that replicates a “dig site” where paleontologists search for fossils.
Kapuki, a 13-year-old eastern black rhinoceros, is expected to give birth to a baby calf in May.
Each year, Chicago Animal Care and Control takes in more than 3,000 stray dogs and 3,000 stray cats on average, but only a fraction of them are reunited with their owners. How a new app could help link lost pets with their owners.
The diets of white Americans contribute to climate change more than the eating habits of African and Latino Americans, according to a new report by a group of Chicago researchers.
Regulators plan to clean up the soil of several residential yards with high levels of brain-damaging manganese, but they have yet to finalize a plan for addressing homes with elevated levels of lead in the soil.
About 4 percent of women incarcerated in state prisons across the U.S. were pregnant when they entered jail, according to a new study published in the American Journal of Public Health.
A first-of-its-kind report shows how climate change is threatening the Great Lakes, and how their ongoing transformation figures to impact the entire region.
Mining for coltan, a mineral compound used to make cellphones and other small electronics, has displaced large numbers of Eastern gorillas in the Democratic Republic of Congo.
Environmentally sensitive development of the Chicago River system would sustain more than 1,600 jobs per year while also improving water quality and recreational space, according to a new study.
Chicago Animal Care and Control was so packed with cats late last summer that it sent out an urgent call for adoptions. Now, the department seems to have found a solution to one of its biggest challenges: overcrowding.
With conditions perfect for flooding, the Better Business Bureau’s Chicago division is urging area residents to take precautions when hiring contractors to address flooding-related damages.
With the help of volunteers who classify sounds from recordings of seismic events, scientists could learn more about the conditions under which earthquakes occur.
Proposed legislation would require the federal government to examine potential health risks from exposure to petroleum coke, a solid byproduct of the oil refining process that had for years been stored in uncontained piles on the Southeast Side.
The complex and relatively advanced cultures of chimpanzees are disappearing as human beings encroach on previously undisturbed areas of African forest, according to a new study involving researchers from Lincoln Park Zoo.
A severe drought earlier this year forced a large group of flamingos to flee a nesting site in South Africa. That’s when Lincoln Park Zoo and other wildlife conservation groups from around the world stepped in.