It’s hard to think small in Alaska. The largest of the United States is home to North America’s highest mountain range. It’s a place where undammed rivers run more than 1000 kilometers, glaciers collapse into the ocean, and polar bears roam.
Daniel Schindler, however, is here hunting for something the size of a grain of rice. Crouching in tiny Allah Creek, hemmed in by alders and smeared in blood, he grasps a rotting sockeye salmon carcass and nearly decapitates the fish with a stroke of a carving knife.
With tweezers, he delves into a cavity of creamy goo tucked behind the brain and plucks out a sliver of what looks like bone. It is an otolith, a bit of calcium carbonate that sits within the inner ear and acts like an internal gyroscope, helping the fish orient its movements.