The juvenile sea squirt wanders through the sea searching for a suitable rock or hunk of coral to cling to and make its home for life. For this task, it has a rudimentary nervous system. When it finds its spot and takes root, it doesn’t need its brain anymore, so it eats it. It’s rather like getting tenure. -Daniel Dennett, philosopher, writer, and professor (b. 28 Mar 1942)

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