Put the words "strange" and "Mars" together and you have my attention.
's Mars rover Curiosity is living up to its name by checking out an unusual formation located in an area called Western Butte in the Gale Crater.
"In the images from orbit, it looks like someone drew a thick straight line with a dark felt marker on the southeastern side of the butte," Curiosity team member Melissa Rice, a planetary geologist at Western Washington University, wrote in a mission update this week titled A Strange Trough on Western Butte.
From Curiosity's viewpoint, the trough is shallow and filled with dark sand.
The rover has been tasked with capturing more images of the area for scientists to study. "We don't know what created this feature, or why it happens to be right here," Rice wrote, "so it's worth stopping for a closer look."