A University of Arizona-led international team of 20 space scientists and engineers this week are conducting an ambitious field test of equipment to study dust devils swirling over the Santa Cruz flats near Eloy, Arizona. The “Matador” experiment, led by Peter Smith of the UA Lunar and Planetary Laboratory and funded by NASA’s Human Exploration and Development of Space enterprise, will help define instruments needed for studying much larger dust devils on Mars later in this decade, possibly in 2007.