InSight, which stands for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, will be the first lander or rover bound for Mars since Curiosity launched in 2011. It will also be the first to dig deep into the planet’s interior in an effort to understand how the planet’s geology evolved over billions of years. The probe will scan for seismic activity, keeping tabs on the planet’s so-called “marsquakes.”