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The work was originally published in 1959 and was awarded the first prize for the promotion of literature for children and young people in 1960 and has been translated into several languages. As a follow-up, Rackwitz wrote "Sunken Worlds - Far S
The book describes man's discoveries of parts of planet Earth that were accidental or planned. The period from 50,000 years ago to today's efforts in space exploration is described.
A popular science work in which Asimov, combining scientific rigor with a lucid style, explores possible threats to the survival of humanity, systematizing disasters according to their nature and probability.
