NASA's Phoenix Mars Lander took this image on June 5, 2008, showing the trenches dug by Phoenix's Robotic Arm. The trench on the left is informally called "Dodo" and was dug as a test. The trench on the right is informally called "Baby Bear," and will be delivered to the Phoenix's Thermal and Evolved-Gas Analyzer (TEGA). The Baby Bear trench is 9 centimeters (3.1 inches) wide and 4 centimeters (1.6 inches) deep. Credit: NASA/JPL-Caltech/University of Arizona/Texas A&M University
