Technicians lift the lander portion of the InSight spacecraft for testing in a clean room facility at Lockheed Martin in Littleton, Col. NASA/JPL-Caltech/Lockheed Martin

NASA's Next Mission to Mars Will Probe the Red Planet's Deep Interior in 2018

InSight will do a deep dive into the Martian underground, putting two instruments onto the surface that will ferry information back from the depths.

An artist’s impression of the InSight lander. NASA/JPL-Caltech