National Geographic 國家地理頻道 - 科學新發現:尋找另一個地球
http://www.youtube.com/watch?v=-TRBDWHVTJw&feature=relatedhttp://www.youtube.com/watch?v=DAj-xQQT2x4&feature=related
http://www.youtube.com/watch?v=W84vyASnZ6c&feature=related
http://www.youtube.com/watch?v=3TEvz-Jwl1o&feature=related
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