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" "La última vez que salí al aire libre fue hace tres años.
Isaac Asimov (c. 2 January 1920 – 6 April 1992) was a Russian-born American biochemist who was a prolific writer of both fiction and non-fiction, his works include the Foundation series and I, Robot.
Biography information from Wikiquote
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Human beings, in terraforming a world, leave out the thorns and thistles, whatever they may be, and human beings then have to labor to keep the world going. It isn't a self-supporting organism as Gaia is. It is rather a miscellaneous collection of Isolates and the collection isn't miscellaneous enough to allow the ecological balance to persist indefinitely. If humanity disappears, and if its guiding hands are removed, the world's pattern of life inevitably begins to fall apart. The planet unterraforms itself.