Recurring slope linea on the surface of Mars | NASA/JPL-Caltech/UA/USGS

Liquid Water Might Not Be the Cause of Dark Streaks on Mars

New research suggests recurring slope lineae on the Martian surface might be caused by flows of sand and other granular material rather than underground supplies of liquid water.

This processed, false-color image of Mars' Hale Crater was taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter. The image highlights dark streaks on the Martian surface known as recurring slope lineae or RSL's. | NASA/JPL-Caltech/University of Arizona