Ralph D. Lorenz is a Planetary Scientist at The Johns Hopkins Applied Physics Laboratory. He has worked for the European Space Agency on the Huygens probe to Titan, and has been involved in many NASA and international space projects, including Cassini, Mars Polar Lander and the Japanese Venus Climate Orbiter. He enjoys visiting exotic locations on Earth - from the Arabian Desert and Alaska to Vanuatu and New Zealand - to learn about process on other worlds, notably dust devils, sand dunes and volcanoes.