Taylor Whitaker, flight software engineer, monitors the progress of the Astrobotic CubeRover during its test run in the Granular Mechanics and Regolith Operations Lab regolith bin at NASA’s Kennedy Space Center in Florida on Dec. 10, 2020. The regolith bin simulates the mechanical properties of the Moon’s surface. NASA and Astrobotic employees put the CubeRover through a series of more than 150 mobility tests over several days to evaluate and improve wheel design.