A little research shows that Arakawa’s estimate of “thousands” might be excessive, but scientists do count somewhere between twelve and twenty-one. We have senses of time, equilibrium, and direction. We have internal senses, like stretch sensors that tell us when our bellies are full and proprioception, which tells us where our bodies are in space. The sense that we call touch actually comes from four distinct receptors—pain, temperature, pressure, and tactility—which combine to give us a remarkably robust sense of the world.
