“Some layers have intriguing ripple ... us understand whether or not Mars once hosted microbial life long ago. The dark rocks are nicknamed “Tungsten Hills” for a California mining district.

The northern plains of Mars, marked by thousands of mounds and hills, hold significant evidence of the planet's watery past.

MYSTERY hills have been found on Mars sparking hopes scientists can solve the planet's biggest mystery from billions of years ago. The Red Planet is dotted with thousands of mounds containing ...