We recently unearthed 15 boxes of books in my dad's old storage building. They are all from the 1970s and earlier. I have picked some that I want to read, of course! This is one of them. From Amazon:

"Describes the heavenly bodies believed by scientists to satisfy the conditions needed for life, details the theories about the origins and evolution of life, and considers all possibilities of life and civilization beyond Earth."

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(Left on the exchange shelf in the Medical Library.)