They are highly intelligent, have nine brains, three hearts, and they roam the bottom of the sea. But how do they think? In this nub we explore the background of the story: Solid, Mostly Smooth.

The human brain is as strange as it is brilliant. But it might be even stranger than we think. Somehow, as a single cell develops into a person, a mind arises out of nowhere inside our heads. It thinks, feels, and has a sense of self. We do not know how or why such a mind suddenly appears, nor do we actually understand how it works. Luckily, we at least have theories.