Engineers in Pasadena, California, sculpt a gravel-like material to mimic the terrain in front of NASA's InSight lander on Mars. Recreating the exact conditions will allow them to practice setting down the lander's instruments here on Earth (at NASA's Jet Propulsion Laboratory) before it's done on Mars.
JPL, a division of Caltech in Pasadena, California, manages InSight for NASA's Science Mission Directorate in Washington. InSight is part of NASA's Discovery Program, managed by the agency's Marshall Space Flight Center in Huntsville, Alabama. The InSight spacecraft was built and tested by Lockheed Martin Space in Denver, Colorado.
For more information about the mission, go to https://mars.nasa.gov/insight.