Are we Alone? Have we been Visited?

Are we Alone? Have we been Visited?

Are we Alone Have we been Visited

Astrophysicist Neil deGrasse Tyson shares his thoughts on aliens and other life in the universe.

[Youtube]

By |2017-07-09T19:39:41+00:00Jul 9, 2017|Categories: Astronomy|Tags: , |

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