Blish's Pantropy tales appear in The Seedling Stars. Humans are modified for alien environments as it's easier & cheaper than terraforming. 1/Seeding Program concerns Pantropy's inception. The program's deteriorated into hideous genetic experimenting & has been outlawed. It describes an adapted, Sweeney, with a liquid ammonia & sulphur bond metabolism with IceIV bones, inserted into a Ganymede colony by the Terran paramilitary Port Authority to capture a scientist to end plans to seed modified humans…