When serial killer Rudolph Cohen is convicted to die for his crimes, by transferring his consciousness into a previous nearly-dead being with no ability to control that being, he chooses a T. Rex. as the previous being, and it turns out that he can control it.
We can project a human being’s consciousness back in time, superimposing his or her mind overtop of that of someone who lived in the past.

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  1. “Just Like Old Times” by Robert J. Sawyer, in on Spec, June 1993.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Robert J. Sawyer