DELIA SCHWARTZ-PERLOV's research interests are focused on the eternally inflating multiverse, and touch on various aspects of cosmology, string theory, quantum field theory and general relativity.  She got her Ph.D. from Tufts University and then spent several years working as a postdoctoral fellow, also at Tufts, where she now lectures on a part-time basis.  

?ALEX VILENKIN has been one of the key researchers at the forefront of theoretical cosmology and has made many significant contributions to the field.  He is best known for his theories of eternal cosmic inflation, creation of the universe from nothing, and for his groundbreaking work on cosmic strings.  He is the director of the Tufts Institute of Cosmology and a member of the National Academy of Sciences.