Cratered terrain made of lighter colored rock. Tiny bright patches in Oceanus Procellarum are splashes of bright-colored rock kicked up by the formation of individual craters
With a little imagination,the gray seas suggest a face, the familiar man in the moon with his lopsided smile and weepy eyes. We are born with a brain that tries to find meaning everywhere, even in the most random,meaningless patterns and human faces are what we are programmed to recognize most readily of all. So most people have no trouble seeing the man in the moon,with his enigmatic,clownish grin