What lurks beneath Mars’s surface? How did the rocky, Red Planet form? What can Mars teach us about our own planet Earth? Soon, these questions will start getting answered by NASA’s newest Mars lander, the Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport, or InSight. With its seismometer and heat probe instruments, InSight will investigate the deep dynamics of Mars, helping scientists discover what lies within its core and learn more about how rocky bodies form throughout the solar system.