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Emily uses metaphors to compare the sky size to the brain. My feelings are that she is showing how the brain has limitless possibilites as the sky is infinite in size. Our brain as we been taught can hold limitless possibilities and as long as we input information (or undergo brain surgery as Paul stated.) we can achieve infinite possibilities. The sky is also a previous story that was implanted by a science teacher who told us the story when we were young and so now we know what the sky is and its properties and we can exceed it by continuing to get our brains worked on. In education we must continue or students to think critically and to always questions the stories they hear by doing research and making their own summary of observations and stories. If we continue to do this especially at an early age we can develop a new breed of criticasl thinkers which would help to facilitate new stories about science and inquiry.