|

Badgers are known for their elusiveness: the mostly solitary animals travel and forage at night, moving from one place to another very quickly. But wildlife biologists recently got lucky and caught one in northwest Cook County.

|

A small nature reserve at a tiny point on the southern coast of Peru is playing a big role in protecting endangered marine and bird species. Learn how the Chicago Zoological Society has been working with the community to engage locals in the conservation effort.

|

The notoriously polluted Chicago River is about to get cleaner with disinfection technology at a Skokie water treatment facility.

|

Chicago's Hyde Park neighborhood has long been a haven for the bright green monk parakeet, but its presence – and recent decline – is shrouded in mystery.

|

An outbreak of canine distemper has infected a record number of racoons in Cook County, putting dogs at risk of contracting the highly contagious virus.

|

The Chicago River is far from America's cleanest waterway. But a few anglers are trying their luck as its ecosystem improves. Captain Tim Frey took us for a winter fishing trip on the river.

|

The FBI wants Apple to unlock an iPhone belonging to one of the people behind December's mass shooting in San Bernardino, California. Apple says it's taking a stand for privacy rights, while the FBI says it's merely trying to conduct the most thorough investigation possible.

|

A fatal virus affecting honeybees around the world is being made worse by humans – and it's impacting our food supply. Find out what some local beekeepers are doing about it.

|

There are signs that climate change is having negative effects on maple syrup production. Researchers are now surveying maple trees in the Midwest to look for them.

|

A 10-week-old sea otter pup rescued after a rough storm in California last month is recovering at her new home in Chicago.

|

Say so long to the adorable red panda cubs captivating visitors of the Lincoln Park Zoo. Soon, the almost 8-month-old cubs will be leaving town.

|

An enormous rooftop greenhouse on Chicago's South Side is growing crops year-round and providing the area with much-needed local produce. Joining us to talk about Gotham Greens' growing power is co-founder and CEO, Viraj Puri. 

|
The collision of two black holes—an event detected for the first time ever by the Laser Interferometer Gravitational-Wave Observatory, or LIGO—is seen in this still from a computer simulation. (Credit: SXS)

The detection of gravitational waves first predicted by Albert Einstein is being hailed as one of the most important discoveries of the modern age. Some local scientists who worked on this groundbreaking achievement are here to explain.

|
A coyote in Lincoln Park, near Belmont Harbor. (John Picken)

A viewer's video, shared with "Chicago Tonight," shows his encounter with a coyote in Columbus Park while walking his two dogs. Coyote mating season has begun, which means the urban animals may behave aggressively.

|

Scientists at the University of Chicago are hoping a new, highly sensitive camera they're developing for the South Pole Telescope will reveal new information about the early universe. The camera measures something that's nearly 14 billion years old: radiation left over from the Big Bang.

|

It’s 2016 and we’re still three metaphorical minutes away from global doom. The Bulletin of the Atomic Scientists say global warming and nuclear weapon proliferation pose serious threats to mankind.