There Will Be Time: time travel and circular causality on Earth.
Time Patrol: space-time travel, circular causality and causality violation on Earth.
Tau Zero: time dilation in space.
The Avatar: space-time travel in space over distances that avoid paradoxes.
There Will Be Time ends with two possible syntheses of time travel with space travel. Either time travellers travel futureward within slower than light interstellar spaceships or travel into the past is mathematically equivalent to faster than light travel so that FTL spaceships can be developed.
Poul Anderson deserves a special Hugo Award as the Most Comprehensive SF Writer.
2 comments:
No dispute there! OTOH, Poul was trained as a physicist.
Kaor, Paul!
Ditto, what Stirling said.
Ad astra! Sean
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