The heavy water fog filling "Sea of Clouds" (right inset) readily compares to the frozen morning mist filling some of Mars' canyons and valleys (main background image).

Main image: Morning ice-fog filling canyons on the planet Mars (photo credit: NASA)  Right inset: "Sea of Clouds" (photo credit: Ned Kahn)

How It Works:  A large pool of slowly undulating fog is generated by an ultrasonic fog machine.  The cool, dense water fog flows like dry ice fog.  The top surface of the fog is alive with waves and complex convection currents.  Side lighting accentuates the patterns.  Viewers will be able to run their hands through the fog and alter the currents.  When left undisturbed, the fog will slowly churn, constantly changing due to its own internal dynamics.