Photographer’s Intimate Portraits of 10,000 Species and Counting

Many of the most threatened creatures on the planet – those on a path to extinction – are found only in the care of humans. They’re in zoos and wildlife sanctuaries and number about 15,000 species in all. National Geographic photographer Joel Sartore is on a mission to photograph every single one of them portrait-style. That’s a lot of photoshoots with wild animals and insects. How do you even make a grasshopper or a frog or a bison stand still for a closeup? (Segment produced by Hayden Reeve)