Slated for 2016, Interior Exploration Using Seismic Investigations, Geodesy and Heat Transport, or InSight, is a mission that would place a single geophysical lander on Mars to study what's below the surface. The InSight mission is similar in design to the Mars lander used in 2007 for the Phoenix mission. The lander would use sophisticated geophysical instruments to check the Red Planet's vital signs, including "pulse" (seismology), "temperature" (heat flow probe) and "reflexes" (precision tracking), according to NASA. InSight's findings could provide scientists with a glimpse into the evolutionary processes of all rocky planets in the inner solar system. Other Mars missions are dedicated to studying the planet's surface by examining canyons, rocks and soil.
Photo credit: NASA