human fatality at the zoo. Exhibits The Pittsburgh Zoo is divided into eight sections, each of which focuses on a particular theme. Kid's Kingdom Kid's Kingdom opened in 1949, when it was then simply called Children's Zoo. In 1994 a naming contest was implemented for a new name to the newly expanded area, the name was from winner Adam Mellinger from Westmoreland County, Pennsylvania. This section of the zoo is an interactive children's area, and contains a petting zoo stocked with domesticated animals; a reptile house; a playground; and several exhibits featuring wildlife from Pennsylvania, including white-tailed deer, North American beavers, river otters and barn owls as well as a California sea lion exhibit. Kid's Kingdom contains many interactive exhibits, such as the meerkat exhibit, which contains crawl-through tunnels that gives the viewer an idea of what it is like to be a meerkat or other burrowing animal as well as a walk-through red kangaroo pen. The animal yards and habitats in Kids Kingdom allow visitors to learn about animals' lives, behaviors, and points-of-view. Kid's Kingdom has been highly ranked by both Parent Magazine and America's Best Zoos Travel Guide. Aquarium Built in 1967 (then called AquaZoo) and renovated in 2000, the PPG Aquarium is a 45,000 square foot, two-story aquarium that presents several aquatic habitats. The aquarium's theme is the "Diversity of Water", and contains several exhibits that portray different marine ecosystems, including a tropical rainforest gallery; a Pennsylvania exhibit, which features fish and aquatic wildlife of the Allegheny River; a penguin exhibit, which is inhabited by kings, macaronis, and gentoos; a coral reef; and an open ocean exhibit. The aquarium used to contain Amazon river dolphins. When the AquaZoo opened in October 1967, it included a baby river dolphin named Pinky. However, Pinky died twelve days after its opening from an eye infection. In 1970, seven river dolphins arrived, but however in 1972, three dolphins died from emergency digestive surgery. One of the river dolphins who had arrived in 1970, Chuckles, survived. Chuckles became the longest-living river dolphin kept in captivity, and by the 1980s, became the only river dolphin kept in captivity at North America. He performed tricks, interacted with visitors, and his trainers would swim with him occasionally. When the aquarium was renovated in 2000, Chuckles was transferred to a customized pool five times the size of his previous home. He died at the elderly age