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Hace 1 día · First human-made signals from space. USSR Sputnik 1: 3 November 1957: First mammal in orbit, the dog Laika. USSR Sputnik 2: 31 January 1958: Confirmed existence of the Van Allen radiation belt. ... Apollo 10: 20 July 1969: First human on another celestial body (the Moon). First words spoken from another world. USA (NASA) Apollo 11:
