Stem Cells, Spaceships and Cell-Based Assays Review

Why are NASA using human stem cells to study the chicken pox virus? How could this help astronauts in space?  Why are the Russians so interested?  And how is the Mars Rover mission helping?  Find out with Thomas J. Goodwin, Manager, Disease Modelling/Tissue Analogues Laboratory at NASA's Johnson Space Centre and Benedikt B. Kaufer, Project Director, Institute for Virologyat the Freie Universität Berlin in this review.