As the world's greenest museum, the California Academy of Sciences' commitment to sustainability is reflected in everything from the building's innovative architecture to its daily operations, public programs, and exhibits. The Academy is home to more than 38,000 live animals in Steinhart Aquarium, one of the world's largest all-digital planetariums, immersive exhibits, and one of the most important research collections in the world, including nearly 46 million scientific specimens.