In this episode of Ask Dr. Universe: Meet The Scientists, Dr. Universe interviews geophysicist Dr. Catherine M. Cooper from the School of the Environment at Washington State University. The pair talk about what a geophysicist does, how Dr. Cooper became interested in her field, careers in Earth Sciences and a recent discovery in geology. Dr. Cooper answers a few questions from young scientists including why are rocks gray, how do volcanoes form and what are the aftereffects of an earthquake.