Exploring the Frontiers of the Mind

The most mysterious, least-known area of man's universe does not lie in the farthest reaches of outer space. Nor is it found in the most remote Amazonian jungle or in the inky blackness of the Mariana Trench. It is located instead in side the human skull, and consists of some 3½ pounds of pinkish-gray mate rial with the consistency of oat meal. It is, of course, the human brain.

The brain is the most important of the body's organs. The heart, after all, is merely a pump; the lungs are an oxygenation system....

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