No Time Like Tomorrow
From the back cover:

OUT OF THIS WORLD

A monster travels back in time to destroy a race called Man on a planet called Earth...

A mild-mannered husband is stranded centuries ahead in a world of peep-show barbarianism...

A jaded sportsman returns to the prehistoric past to hunt a gigantic brontosaurus...

The governor of a penal space settlement makes the supreme sacrifice for the colony he loves...

Here are startling stories -- adventures that soar beyond the barriers of time and space, yet remain perilously close to the boundaries of reality.
Science fiction, Fiction, science fiction, general, Fiction, general, Time, Fiction
Brian W. Aldiss