The California Academy of Sciences is a research institute and natural history museum in San Francisco, California, that is among the largest museums of natural history in the world, housing over 26 million specimens.A planetarium, aquarium, and natural history museum all under one living roof, the California Academy of Sciences is located inside Golden Gate Park. NightLife is held Thursdays year-round, from 6-10 p.m. and is a 21-plus event. Here are some of our guests who participated in NightLife.