1970s short story where USA wants to terraform Mars, Communist China wants to settle Mars via pantropy, USSR is defunct
Trying to find story, with an alien race who was digging tunnels to change planet's rotation and eventually orbit
Circa 1980's prehistoric intelligent reptiles starving and time traveling and terraforming present day Earth for survival
Sci-fi novel set on an ocean planet with genetically modified aquatic humans and terraforming process
Could the terraforming techniques from Red/Blue/Green Mars work on any other planets in our solar system?
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