Park ranger Paul Fugate vanished on an Arizona trail more than forty years ago. Investigators are still looking for him.

The rare Chilean soapbark tree produces compounds that can boost the body’s reaction to vaccines.

Over the past 14 years, Martin Guth has built a monopoly on some of the world’s rarest birds. Will his secretive organization ultimately help put more parrots in the wild, as he says or—push them closer to extinction?

How a meteorite hunter’s obsession took him from the mountains of Colorado, to the Bundy Ranch, and eventually landed him in jail.

They’ve built a hidden society in a state park. Among the haole squatters of Kalalau.

He had the gear, the charm, the trail stories. He found his marks in outdoorsy women.

Traditions, feuds, and controversies in British pest control.

On the hundreds of corpses that go unindentified every year along the U.S.-Mexico border.

On the theft of 6 million pounds of maple syrup from Canada’s strategic reserve and the group of free market renegades who are fighting “The Maple Wars.”

Law enforcement vs. local fishermen in Massachusetts.