As part of a broader movement among zoos to better simulate a natural environment, the Philadelphia Zoo is moving forward with an ambitious expansion of its trail system. The facility's 700-foot treetop trail that allows monkeys and lemurs to wander from their regular habitats is just the beginning. The project will ultimately allow big cats, apes, hippos and more to hit the trail, albeit not all at the same time on the same route. The goal is to enhance the animals' experience while advancing the zoo's conservation mission.
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