Dr. Oakley, Yukon Vet: Northern Lites

Every day is a new challenge for Dr. Michelle Oakley, the only all-species vet for hundreds of miles in the Yukon. Whether wrestling bison, tracking ibex in the mountains, performing surgery on a bear, or braving frozen landscapes to return lynx to the wild, Dr. Oakley will do whatever it takes to keep the animals in her charge safe and healthy. (National Geographic)