Robert Herrick ­ Associate Research Professor ­ Robbie's two primary research areas are the impact cratering process and the resurfacing histories of the planets. He mostly works with data from NASA's unmanned missions to the various planetary bodies in the solar system. Geological and geophysical techniques he has used over the years include spherical harmonic analysis of gravity and topography, photogeology, geologic field work, reflection seismology, stereo radargrammetry, magnetic prospecting, and finite-difference modeling. His background includes four years with Exxon and ten years as a staff scientist at the Lunar and Planetary Institute (LPI) in Houston. During his time at LPI he was heavily involved in that organization's educational and public outreach programs, including managing the outreach department for a year. He joined the GI after bicycling from Houston to Fairbanks in the summer of 2004, a 3-month trip that led many to question his sanity. http://www.gi.alaska.edu/~rherrick