NASA's Curiosity rover settled in the northern part of the 154-kilometer-wide Gale Crater on Mars on August 6, 2012. It is equipped with Dynamic Albedo of Neuron (DAN) instrument and other tools for measuring, imaging, and sampling as wells as looking for signs of chemicals essential for life. They also sought the planet's past climate.
In a new study printed in the Journal of Geophysical Research, DAN instrument on lodge the Mars Science Laboratory Curiosity rover identified ranges of water equivalent hydrogen (WEH) and chlorine-equivalent concentrations of 1.5-2.5 wt. % and 0.6-2 wt. %, respectively. DAN instrument perceived an overall decrease in both WEH and chlorine-equivalent concentration measured over the sand and loose rocks of the Smooth Hummocky unit, which is a unit composed mainly of sand and loose rocks.To read more, click here.