Science: Polaroid

In the swank Greenbrier Hotel at White Sulphur Springs, W. Va. one day last week, members of the convening Society of Automotive Engineers traipsed into a darkened room, blinked in the glare of a pair of automobile headlights, then, passing behind a clear glass windshield, observed that although the light beams illuminated the room display, they no longer glared into the observer's eye.

This small miracle was made possible, the engineers were soon told, because the "windshield" through which they looked was made of a recently developed material called Polaroid, and the headlight lenses were...

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