Tokyo-based artist Fujiko Nakaya's Fog Bridge #72494 inaugurates the Exploratorium's new Over the Water program at Pier 15 on San Francisco's downtown waterfront. In this catalogue essays by Exploratorium curator Marina McDougall; art wrtier Leigh Markopoulos; and architecture/design curator Henry Urbach, further illuminate the fascianting word of the world's first artist to create sculpture using the ephemeral medium of fog.