Joyful by Ingrid Fetell Lee

"'That's nonsense that we only have five senses,' he was known to say. 'We have thousands of senses, we just don't have names for them.'...scientists do count somewhere between twelve and twenty-one. We have senses of time, equilibrium and direction. We have internal senses...The sense 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."