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Calumet River (Courtesy Friends of the Chicago River)

A new $960,000 grant will improve 2.5 miles of streams for nearly 20 species of fish and create 10 acres of neighborhood green space in the Chicago-Calumet region. 

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(Mexican Wolf Interagency Field Team / Chicago Zoological Society)

A Mexican wolf pup born this spring at Brookfield Zoo and released into the wild as part of a species recovery program was tracked down in New Mexico and is healthy, the zoo announced this week.

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Monarch butterfly populations have dropped by more than 80 percent over the past two decades. A bill approved this week aims to boost the monarch’s recovery by protecting milkweed, a plant that serves as the butterfly’s only source of food. 

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(Julia Fuller / Lincoln Park Zoo)

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.

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(Courtesy Brookfield Zoo)

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.

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(Jim Schulz / Chicago Zoological Society)

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.  

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(Hanna Knutsson / Flickr)

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

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(Jonathunder / Wikimedia Commons)

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. 

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(Jill Wagner / Lincoln Park Zoo)

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. 

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Lincoln Park Zoo's upcoming Sea Explorer 5-D lets visitors "dive" into the ocean in a virtual submarine. (Courtesy Attraktion!)

A new experience coming this fall to Lincoln Park Zoo will allow visitors “dive” into the ocean and explore landscapes and wildlife at the North and South Poles or in deep ocean waters. 

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Black-crowned night herons average about 2 feet in length and weigh nearly 2 pounds. (Courtesy Lincoln Park Zoo)

The black-crowned night heron is one of the rarest birds in Illinois. Lincoln Park Zoo now hosts a colony of more than 600 herons, but things have getting a bit crowded. 

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(Courtesy ©Alaska SeaLife Center)

Shedd Aquarium experts are among those caring for a whale calf rescued Sept. 30 in Alaska’s Cook Inlet. The calf belongs to a critically endangered population of beluga whales.

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(Courtesy Lincoln Park Zoo)

It looks like an art project, but a seven-floor structure at Lincoln Park Zoo is outfitted with logs, bricks, sticks and other materials to provide cozy spaces for insects to nest.

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(Courtesy PETA)

Dressed in little more than black-and-white body paint, a PETA supporter on Wednesday will urge passersby to skip performances this month by a circus company with a track record of mistreating animals. 

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(Courtesy Chicago Zoological Society)

More than 125 animal welfare experts from around the world will gather in October to share new research and best practices related to caring for animals in zoos and aquariums.

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(George2001hi / Wikipedia)

A Chicago-area man who wanted to buy a dog for his daughter nearly fell victim to a West African-based scheme targeting thousands of hopeful pet owners. What the Better Business Bureau is saying about the scam.