science-junkie: In 1963 on his “Transmission of Information by Extraterrestrial Civilizations” the Russian astronomer Kardashev proposed a system to classify any extraterrestrial civilizations based on the energy available to them in order to make
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science-junkie: In 1963 on his “Transmission of Information by Extraterrestrial Civilizations” the Russian astronomer Kardashev proposed a system to classify any extraterrestrial civilizations based on the energy available to them in order to make
