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The Zoo is open 8 a.m. to 6 p.m. daily. Entry passes are required for all guests, including infants. Plan your visit.

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Earth Optimism: Conservation Success Stories

Celebrate Earth Week with some of the incredible conservation success stories at the Smithsonian's National Zoo and Conservation Biology Institute. The interactive features of this online tour introduce six amazing species and their stories of hope that will make you an Earth Optimist! Click "Begin Tour" to get started.