Seismic readings of the interior of Mars strongly suggest large quantities of water buried 6 to 12 miles underground.

The idea for what would become the Mars InSight mission first appeared in ... The first of the two instruments to be deployed was the SEIS, or Seismic Experiment for Interior Structure.

InSight's first photo from landing on Mars. Credit: NASA/JPL-Caltech Mars looks like a dusty wasteland in the first photo from NASA's InSight lander sent from the surface of the red planet.

NASA's InSight lander has taken what may be its last photograph of Mars, approaching its inevitable death with peaceful acceptance. "My power’s really low, so this may be the last image I can ...