Dr. Itzhak Fouxon Tel Aviv University Date: Nov. 30, 2008 Title: From hydrodynamics to gravity and back Abstract: Hydrodynamics can be said to be as old as it is ill-understood. Despite hundreds of years of studies the structure of the absolute majority of fluid flows in nature remains unknown. It is likely that the very language we use to describe fluids is not suitable for making progress. In this talk we will discuss an intriguing connection between hydrodynamics and gravity that has emerged recently thanks to the AdS/CFT correspondence. It will be shown that the motion of ordinary fluids allows a description in terms of the dynamics of a certain spacetime, though the minimal formulation is still ahead of us. We will see how hydrodynamics can help understand gravity. We will also address another subject at the interplay of fluids and gravity - the entropy and viscosity bounds.