Four years ago the  Smithsonian Channel  featured Steven Hawking on four space documentaries.  One was  Leaving Earth:  Or, How to Colonize a Planet .  He passed away in 2018 at the age of 76 before the program was completed.  I just watched this episode and it helped me synthesize variant thoughts in my mind about the ultimate fate of Humanity. In 1976 I spent a summer at NASA's Ames Research Center, joining a group of university faculty on Project Orion to  design the first device capable of detecting an extrasolar planet .  At that time, the planets of our solar system were the only ones ever seen.  After meeting Carl Sagan at Ames during that interval to view the first photo sent back by Viking 1, five years later when I was working for the U.S. Senate, I helped him convince the U.S. Congress to gain the initial funding for the Search for Extraterrestrial Intelligence. Established was annual funding for 12 years, leading to the formation of the SETI Institute in Palo Alto. Sinc