The circus founder played a small, peculiar role in the nascent activist movement—one that would later cheer the end of the “Greatest Show on Earth.”

Wild pigs are running rampant—and doing billions of dollars of damage each year.

But two simple changes can help.

The ocean’s bivalves might hold a few clues to the great mysteries of aging.

The wildlife biologist Jeff Sikich talks about the famous cat, its habitat, and how to keep yourself—and your pets—safe.

A montage of a very cute and impossibly contagious phenomenon

A new pop-up book imagines how Chicago’s ecosystem might evolve in a world with fewer humans.