This is a discussion session of the topics covered during the first day of the workshop, moderated by Travis Dore (University of Illinois at Urbana-Champaign).
This talk was recorded on December 14th, during the online workshop "Relativistic Hydrodynamics: Foundations, Novel Applications and Interdisciplinary Connections": [https://gqfi.aei.mpg.de/node/28].
This workshop is a joint venture between the Gravity, Quantum Fields and Information group [https://www.aei.mpg.de/GQFI] and the Illinois Center for Advanced Studies of the Universe [https://icasu.illinois.edu/].