The EPA likely won’t be able to determine the source of a late October oil spill in the Chicago River because the agency was notified about the spill two days after it occurred, the EPA said Tuesday. 

He holds the American record for most consecutive days in space. Retired astronaut Scott Kelly discusses the incredible mission described in his new book, “Endurance: A Year in Space, A Lifetime of Discovery.”

You’ll need to look closely to spot Lincoln Park Zoo’s new baby monkey. The infant, born Oct. 15 to first-time parents, is barely visible as it clings to its mother’s neck.

One of the oldest giraffes in a North American zoo died last week. At 27, she had surpassed the median life expectancy for giraffes, which is about 17-20 years.

A team led by University of Chicago professor Angela Olinto will use a NASA super pressure balloon to study mysterious cosmic rays that could offer groundbreaking new insights about the universe. 

Thousands of planets orbiting alien suns, giant new telescopes coming online: Could we finally answer the question “Are we alone in the Universe?”

Autumn is not just pumpkin spice lattes and apple picking. Learn about the science behind the season with physicist Dr. Olivia Castellini.

Scientists say there are more bacteria in the ocean than stars in the universe, yet little is known about them. A new study outlines the “crazy idea” that led to a project described by one scientist as the “Google database for microbes.”

There are more soggy days ahead. Find out how you can help ease the burden on the Chicago River and reduce the risk of flooding.

Viewers on four continents will watch a virtual presentation hosted by Adler Planetarium in early November to learn about the possibility of life on other planets.

One of Brookfield Zoo’s newest tenants recently emerged from her mom’s pouch and can now be seen at the zoo’s Australia House.  

University of Chicago paleontologist Neil Shubin returns for another review of stories making headlines in the world of science. 

Weather forecasts say Chicago might see a third straight mild winter. Will that prediction pan out?

Scientists should respond to a “political climate of opposition to facts” by speaking out about their work, said John P. Holdren during a recent lecture on climate change at the Illinois Institute of Technology.

The remarkable comeback of 13 sport fish species in the Illinois River began just after implementation of the Clean Water Act, according to a new study by the Illinois Natural History Survey. 

Did you know it’s International Sloth Day? We check in with one of Lincoln Park Zoo’s experts to learn about these furry, slow-moving animals.