Floating Mind

The human brain is a fragile, gelatinous mass of fat and neurons. Left to its own devices, its sheer weight would cause it to collapse in on itself, crushing the blood vessels at the base of the skull. Fortunately, our consciousness is literally floating. The cerebrospinal fluid (CSF) is a crystal-clear liquid that bathes the brain and spinal cord, providing a miraculous hydraulic cushion that red...