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YouTubeHISTORY
The Search Goes On for Alien Life *Marathon* | The Universe
In a galaxy filled with a billion stars, in a universe filled with a hundred billion galaxies--are we alone? SETI--the Search for Extraterrestrial Intelligence--is a privately funded project using radio telescopes and optical telescopes to scan the stars for signals. See more in this marathon from The Universe. #TheUniverse Subscribe for more ...
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