The zoo's largest new arrival, Wallace, a hippo, is on its way from Jakarta, Indonesia.

An inbred white tiger must be neutered; Carrie makes accommodations for a potbellied pig; Bud searches for a short in the 10-mile-long electric fence.

The DeYoung Family Zoo prepares to welcome a baby hippopotamus; Carrie Cramer and her team perform a rescue at the home of a cat hoarder.

Life at DeYoung Family Zoo in Michigan's Upper Peninsula includes the rescue and rehabilitation of exotic animals and local wildlife.

Chester Zoo is one of the most popular wildlife parks in Great Britain, attracting more than 1.8 million visitors annually. Through the use of cameras equipped with the latest technology, this program takes viewers behind the scenes of the zoo, capturing animal behavior close up, as well as the relationships the animals share with their keepers. Memorable scenes filmed over the course of the series include the birth of a baby giraffe, a pregnant viper getting X-rayed, chimps battling for dominance, and a red panda giving her partner the cold shoulder.

The stories of the exotic animals and the people who care for them at the Dublin Zoo.

This Emmy-nominated series is designed to mess with the ultimate supercomputer. Host Jason Silva reveals how brains process information related to topics like stress, addiction, competition, food, trust and language. Interactive games and hidden-camera experiments capture hilarious and shocking results, and viewers get real-world takeaways -- how to improve memory, get a better night's sleep, make more money -- to use in everyday situations.

This documentary series focuses on extreme construction projects -- be they the biggest, tallest, longest or deepest in the world -- and the machines used to create extraordinary structures. Episodes include the people responsible for the cutting-edge design and engineering of each build, talking about how concept transformed to reality. The processes that go into staffing and operating the modern marvels once they are completed are also covered.

One of the largest and most popular zoos in the U.S., Ohio's renowned Columbus Zoo and Aquarium and its conservation park The Wilds, houses more than 10,000 animals on 12,000 acres. It's also the part-time home of beloved wildlife guru Jack Hanna, the zoo's director emeritus. Now, Nat Geo Wild is taking viewers inside the grounds and allowing them to experience what visitors can't: compelling, heartwarming stories, and behind-the-scenes moments and adventures. "Secrets of the Zoo" introduces both the animals and the legions of workers who create unforgettable connections between people and wildlife.