The couple answer your questions about their time in the Frank Church-River of No Return Wilderness, wolf sightings, and the making of the PBS Nature film.

This film investigates the parallel stories of collapsing Pacific salmon populations and how biologists and engineers have become instruments in audacious experiments to replicate every stage of the fish’s life cycle.

An interactive map plotting the hatcheries and dams of the region.

An interview with Salmon: Running the Gauntlet filmmaker Jim Norton.

Hatcheries fail to deliver on their promise of a future full of salmon.

Here is a brief look at the lifecycle of one of the world’s most popular and most important fish.

Facts and stats about the members of the Salmonidae family.

This week's dirt: New study suggests birds with high color variation evolve more quickly, fossils belonging to giant panda ancestor found in Europe, scientists say lizard spit may curb our appetite, and a recent court ruling that pit bulls are “inherently dangerous” sparks debate.

Watch the full episode of the PBS Nature film which examines koala communication, vocalization, and social structure.

Watch the full episode of PBS Nature's Silence of the Bees, which looks at a recent phenomenon dubbed Colony Collapse Disorder (CCD).