Project Mastodon

'Hudson lay in his sleeping bag, staring at the sky. It bothered him a lot. There was not one familiar constellation, not one star that he could name with any certainty. This juggling of the stars, he thought, emphasized more than anything else in this ancient land the vast gulf of years which lay between him and the Earth where he had been-or would be-born.' Enjoy a fantastic time travel short story by the master Clifford D. Simak! Published in 1955.