In the year 2162, the eminent chronologist Sam Magruder mysteriously disappeared while running an experiment. Some years later, while arguing about the possibility of being totally alone, the evidence is produced that Sam Magruder did not die in 2162, but was transported back in time some 80 million years! Engraved upon sandstone slabs, found in a bed of shale, is found the story of Sam Magruder's existence in the late Cretaceous period. Alone, with no hope of ever seeing another human being again, Sam survived, and this is his story.
The famous paleontologist George Gaylord Simpson penned this short story, apparently for his own amusement, but it is a masterpiece. Considering Dr. Simpson's field, I would have assumed that this story would be entirely about what Sam found in the Cretaceous, but that's only part of the story. As the opening chapter tells, this is the story of a modern (OK, future) man's coming to grips with his situation, one containing only danger and isolation.
I am sure that my words do not do justice to this story. This work is complex and fascinating beyond some lengthy works produced by noted authors. I recommend it to everyone.