Joel Sartore, leader of National Geographic's Photo Ark, is Doing Work that Matters - a podcast by Cam Marston

Joel Sartore has grand ambitions. Photographing every animal in human captivity requires exhausting travel to the four corners of the earth. But he's on a mission to catalog these creatures, great and small, for human posterity. He's lived most of his life with a camera in his hands and his eye for backgrounds, expressions, and framing the subject matter has gained him accolades throughout his career. And while you'd think he may be over good photography, he's still captivated by a really good picture. 

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