Now on display is a 5,000-square-foot exhibit on excrement titled “The Scoop on Poop,” which invites visitors to explore the science of scat. The exhibit is filled with photos of animals in some of their most indelicate moments. Stool sample models abound: haylike football-sized balls (elephant), kidney-bean-looking pellets (porcupine) and coallike lumps coated with fur (black bear).

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