茫茫的太空除了人类以外,是否还有其他的智慧生命呢?人类对于这个具有无穷魅力的问题,已经思索了几千年。大约在公元前400年,希腊哲学家梅麦罗多罗斯写道:“在宽阔的土地上仅长一棵小麦,在无限的宇宙中仅存在一个有生命的世界,这是违反自然的。”但是,实际探索外星智慧生物的工作,是在宇宙科学、天文学相当发达的20世纪60年代才开始的。1960年,美国天文学家弗兰克林·德里克等人,利用美国格林巴克国立电波天文台的射 Does human space have other intelligent life besides human beings? Human beings have been thinking about this for many thousands of years. About 400 BC, the Greek philosopher Medero Rodos wrote: “On a wide field there is only one wheat tree. There is only one living world in the infinite universe. This is against nature.” However, the actual exploration of alien intelligent creatures began in the 1960s when space science and astronomy were quite developed. In 1960, American astronomer Franklin Derrick and others used the launch of the National Green Wave Observatory in Greenbark, United States.