从19世纪以来，世界各地不断地出现目击不明飞行物（英文缩写为UFO）的报道或传闻，特别是20世纪50年代有空间科学以来，"UFO"、"飞碟"、"外星人"的目击事件与日俱增。在这些报道中，UFO像是"幽灵"一样出没于地球的空域。随着宇宙科学的发展，人们愈来愈关切在茫茫的大宇宙中，除了地球人之外，究竟有没有"外星人"，或者说是否存在地外智慧生命？如果说"有"，他（她）们究竟是什么模样？生活在宇宙的何方？地球人应怎样寻找他（她）们呢？
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Release date
May 30, 2014 -
Formats
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OverDrive Read
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EPUB ebook
- File size: 578 KB
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Accessibility
No publisher statement provided -
Languages
- Chinese
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