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The Planet That Wasn't is a collection of seventeen scientific essays by Isaac Asimov. It was the twelfth of a series of books collecting essays from The Magazine of Fantasy and Science Fiction. These essays were first published between December 1974 and April 1976. It was first published by Doubleday & Company in …

The Positronic Man is a novel co-written by Isaac Asimov and Robert Silverberg, based on Asimov's novella The Bicentennial Man. It tells of a robot that begins to display characteristics, such as creativity, traditionally the province of humans; the robot is ultimately declared an official human being. The film …