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The zoo is open! All visitors will require free entry passes and be required to follow safety measures. Free timed-entry Asia Trail/Panda Passes are required for the giant panda viewing.

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Earth Optimism: Cheetahs

First come cubs, then comes species recovery. Find out how a thriving population in human care benefits wild cheetahs. On Earth Day weekend, April  21 to 23, the Smithsonian is convening the Smithsonian Earth Optimism Summit, an event about the science that's working to solve complex conservation challenges around the globe.