William Mullen

The long-idled site of the U.S. Steel South Works was buzzing with activity once again Wednesday as tens of thousands of workers, nurses, cleaners, guards and a few gigolos took...

A mysterious infection that led to the death of a 9-year-old male chimpanzee at Lincoln Park Zoo last week has been identified as a respiratory virus that causes at least...

Kaylee, a 15-year-old female dolphin at Brookfield Zoo's Seven Seas pavilion, was euthanized by zoo veterinarians Friday morning after she struggled with failing health the last three weeks. Early this...

Brookfield Zoo lost a true grande dame Thursday night when veterinarians had to euthanize Alpha, a feisty 48-year-old lowland gorilla who for much of her life was at the top...

Brookfield Zoo lost a true grande dame Thursday night when veterinarians had to euthanize Alpha, a feisty 48-year-old lowland gorilla who for much of her life was at the top...

Many visitors to the Field Museum's "Evolving Planet" exhibit, which explores the evolution of life on Earth, seem to lavish most of their attention on the impressive displays of dinosaurs....

Lincoln Park Zoo officials are watching six ailing, quarantined chimpanzees around the clock after an adolescent member of the group died in the zoo's hospital earlier this week. The 9-year-old...

Amid months of grim economic news that has been crippling public museums, $3 million worth of rocks from outer space and a $7.3 million endowment landed at the Field Museum...

For the last 5 million years, the frozen polar ends of the Earth have melted on a regular basis, raising sea levels dramatically to heights that, if achieved today, would...

Horsing around without adult supervision, a large group of adolescent and pre-adolescent dinosaurs died en masse 90 million years ago when they ran pell-mell into a mudhole, sinking to their...