Why would anyone spend five winters in the sub-zero terrain of Glacier National Park tracking a creature locals call a mountain ghost? For wildlife biologist Douglas Chadwick, that grueling wolverine work was part of a career built on deep immersion, suffering for the data to understand how animals move across the land.

This deep dive follows Chadwick from a rigorous zoology education and mountain goat fieldwork to his long partnership with National Geographic, his global work with elephants and Gobi bears, and his pivot from studying single species to protecting entire connected ecosystems through wildlife corridors.

• His method-acting approach of embedding with animals for years
• How logging alters snowpack and can quietly starve mountain goats
• Studying the critically endangered Gobi bears surviving in a desert ...