Wild Inside the National Zoo

Each year, two million visitors flock to Smithsonian's National Zoo in Washington, DC. But beyond a popular attraction, the zoo is an eminent research center dedicated to studying the 2,000 animals under its roof, many of which are endangered. Go behind the scenes with these rare creatures and their caretakers. From discovering a scientific breakthrough in canid conservation to caring for a sloth bear with high blood pressure, we bring you a remarkable look into the complex relationships between animals and the humans who protect them.