Not to mention neuroplasticity: the brain literally can reallocate neurons to different functions based on whether they're used (and what functions are needed).

Not to mention neuroplasticity: the brain literally can reallocate neurons to different functions based on whether they're used (and what functions are needed). It's a really fascinating aspect of psychological therapy and rehabilitation for people with birth defects or traumatic brain injuries. If a person has a damaged or missing part of their brain, they can develop the same functionality elsewhere. The brain is built to adapt to information instead of just processing information. EDIT: http://en.wikipedia.org/wiki/Neuroplasticity http://en.wikipedia.org/wiki/Neuroplasticity