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The late Carl Sagan may not have been the greatest scientist of the 20th century, but except for Albert Einstein he certainly was the most recognizable. N.Y. And while all of those were important endeavors, Sagan probably will be best remembered as the greatest popularizer of science of the century. Today, it would be almost easy to take viewers on a tour of time and space thanks to advances in computer imaging and technology. But two decades ago, computer graphics was in its infancy. Despite that, this ambitious and informative series remains a stunning tribute to the man who created it.