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Expanding Images of Our Universe, Part One: The Electron Microscope |
| Section: NATURAL SCIENCE / AT THE EDGE |
| Author: John E. Johnson Jr. |
| Publication: The world & I online |
| Issue Date: 1/1/1988 |
| Size: 3,777 Words, 22,541 Characters |
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Editor's Introduction
Using light from the sun, our two eyes, and one brain, plus connecting communications channels, we produce images of the world around us. Yet our minds seek images of things we cannot see--things that are very small, buried in our bodies or far out in space, or deep inside the earth.
Several species can recognize themselves in a mirror, but humans alone ask the question "Who am I?" and consider the vastness of space and time. The human brain, with its trillion simultaneous chemical reactions, allows this singular phenomenon of self-awareness. Yet without the senses, especially vision, the brain would be isolated and unable to ask such questions.
A primitive brain evolved in fish several hundred million years ago, and through the ages it accumul...
. . .
...truments capable of aiding mankind in imaging our Universe. One of the most powerful of these instruments--the electron microscope--has allowed us to image the very molecules of which we are made. Despite these great advances, the frontiers of imaging still beckon with unknown vistas to be viewed by that pioneer who can master yet another new way to apply the principles of imaging to our world.
(818 of 22,541 characters)
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