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卡尔·萨根（Carl Sagan）生于1941年,逝于1996年,终年55岁。萨根是当代伟大的天文学家和科普作家,一生致力于在世界各地宣传科学精神,宣传和平思想,在思想界、学术界和社会上享有盛誉,被赞誉为“太空探索与太空科学的化身”、“历史上最成功的科学普及家”、“伪科学和迷信最有力的对手和敌人”。2001年12月,卡尔·萨根60岁诞辰期间,世界一些地区举行了各种活动庆祝,我国科普界也于15至16日举办论坛纪念萨根逝世五周年。本文是萨根的妻子安·德鲁彦（Ann Druyan）在美国庆祝活动上的演讲节选。——编者
Carl Sagan was born in 1941, died in 1996, aged 55. Sagan, a great contemporary astronomer and popular science writer, devoted his life to promoting the spirit of science in all parts of the world and promoting the idea of peace. He is renowned in the fields of thought, academia and society and is praised as “the embodiment of space exploration and space science” , “The most successful populace of science in history,” and “the most powerful adversary and enemy of pseudoscience and superstition.” In December 2001, during the 60th birthday of Carl Sagan, various activities were celebrated in some parts of the world. Our scientific community also held a forum on the 15th and 16th to mark the fifth anniversary of Sagan’s death. This article is an excerpt from the speech by Ann Druyan, Sagan’s wife, at the celebration of the United States. --editor