The arctic is warming faster than any place on earth, and nations are jockeying for position to move in and extract previously inaccessible natural resources. As this happens, northern communities are sure to expand as people move into these regions. This story will be familiar to us all, as throughout human history, people have always moved from place to place to find the resources they need. Meanwhile, caribou (also known as reindeer in Europe) are the furthest-migrating terrestrial mammal in the world, traveling as far as 1,350km annually from their winter ranges to their preferred calving grounds, themselves moving to find the resources they need. Time will tell if their migratory instincts take them through, or around, growing northern settlements of people, most of whom will have recently migrated themselves.