Interstellar visitors who use their superior technology to free Earth from war and disease, a fetus with superhuman intelligence, and a time sphere allowing entrance into the future are described in three of twenty-two stories by the noted science-fiction writer.
"Interstellar visitors who use their superior technology to free Earth from war and disease, a fetus with superhuman intelligence, and a time sphere allowing entrance into the future are described in three of twenty-two stories by the noted science-fiction writer."@en
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