Inside the Hidden Wonders of the Shrinking Arctic

Over the course of 20 years, writer Neil Shea explored the awe-inspiring landscape of the Arctic. He saw narwhals poking their tusks above the water, herds of caribou moving across the tundra, and majestic white wolves raising their young. He documents this fragile beauty in his new book, “ Frostlines .” We talk to Shea about his adventures, and how climate change is transforming the region.