In 1980, Robert Freitas suggested a more ambitious plan: a self-replicating spacecraft intended to search for and make contact with extraterrestrial life.
羅伯特·弗雷塔斯（Robert Freitas）在1980年提出了一個更野心勃勃的計劃：利用自我複製太空船進行搜尋和聯繫地外生命。