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外星人到哪兒去了？
6,503,610 views |
史帝芬韋柏 |
TED2018
• April 2018
Read transcript
宇宙非常古老，極度廣大，具有數兆個星球——所以，外星人在哪裡？天文學家史帝芬韋柏有一項解釋：我們在宇宙中是孤獨的。在這場能拓展思維的演說中，他詳細說明了一個星球若要有外星文明，會需要清除多麼大的障礙——並說明了我們可能的宇宙孤獨也是很美麗的理由。「宇宙的沉默正在吶喊：『我們是走運的生物。』」韋柏說。
science
astronomy
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universe
physics
exploration
Planets
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