chemistry, dimensions, and temperature to support organic evolution. UFO hypothesis and survival question (PDF). Declassified Document, Department of Defense

费米悖论

无意隐藏，只是人类自己不肯承认和外星人接触的证据，如麥田圈。外星人只与合适的人类进行接触，虽无隐藏证据的意思但也没有意愿广为公布。夏眠假說（英语：Aestivation hypothesis）人择原理天體生物學《計算中的上帝（英语：Calculating God）》费米问题恆星際旅行胚種論安靜又吵鬧的外星人（英语：Quiet

哺乳动物

doi:10.1126/science.2740905. Geiser F. Aestivation in Mammals and Birds. Navas CA, Carvalho JE (编). Aestivation: Molecular and Physiological Aspects. Progress

Found in articles

宇宙语言

chemistry, dimensions, and temperature to support organic evolution. UFO hypothesis and survival question (PDF). Declassified Document, Department of Defense

费米悖论

哺乳动物

doi:10.1126/science.2740905. Geiser F. Aestivation in Mammals and Birds. Navas CA, Carvalho JE (编). Aestivation: Molecular and Physiological Aspects. Progress