Beneath the roof, museumgoers will find a natural-history museum, a planetarium, a rainforest with free-flying birds, a coral reef inhabited by 4,000 fish, and an aquarium filled with saltwater pumped in from the Pacific Ocean. The most influential display, though, may well be the marriage of the museum's physical design with its educational mission. "It's not about dusty stuffed animals," says executive director Greg Farrington. "It's about human survival and living in harmony on planet Earth."