This is a really interesting story about some scientific work that has resulted in a technique to slow the speed of light to the point that it is potentially useful as a carrier for information, read the whole thing for the full context of the research.
Physicists said the new approach to taming light could hasten the arrival of a futuristic era in which computers and other devices will process information on optical beams instead of with electricity, which for all its spark is still cumbersome compared with light.
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