Scientists have calculated that there could be a minimum of 36 active, communicating intelligent civilizations in our Milky Way galaxy, according to a new study.
원문출처 : https://www.cnn.com/2020/06/15/world/intelligent-civilizations-galaxy-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/06/15/world/intelligent-civilizations-galaxy-scn-trnd/index.html