Science fiction - Time travel | Britannica.com

Science fiction - Time travel: A complement to travel through space is travel through time. A prototype of the time travel story is Charles Dickens’s A Christmas Carol (1843). The story features the Ghost of Christmas Yet to Come, who is magically able to immerse the hapless Scrooge in the dire consequences of his own ungenerous actions. But for all their familiarity, Scrooge’s time travels were mere ghostly dreammongering. The SF version of time travel arrived when H.G. Wells suggested in The Time Machine (1895) that the process might be done mechanically.
For a genre whose central issues involve processes of historical change, time travel

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