Humans are modified for alien environments as it's easier & cheaper than terraforming.1/Seeding Programconcerns Pantropy's inception. The program'sdeteriorated into hideous genetic experimenting & has been outlawed.It describes an adapted, Sweeney, with a liquid ammonia & sulphurbond metabolism with IceIV bones, inserted into a Ganymede colony by theTerran paramilitary Port Authority to capture a scientist to end plansto seed modified humans on distant worlds. However, the governmentreally wants to derail pantropy because it threatens terraformingprofits. Sweeney is surprised to find an established community onGanymede, realizes he's expendable & that he's been fed false hopesabout being changed into a normal human. He switches sides. With hishelp the Ganymedans manage to launch seed ships to destinations beyondgovernmental reach.2/The Thing in the Attictells of a small groupof intellectuals from a primitive culture of modified monkey-likehumans living in jungle trees. Having openly voiced the heresy thatgodly giants don't literally exist as claimed in the book of laws,they're banished. In their exile on the ground they have to adapt, fightmonsters & finally happen upon the godly giants--human scientistswho've just arrived on the world to monitor the progress of theadapteds. The protagonists are told their whole race must eventuallyleave the treetops to conquer their world.3/Surface Tensionhas apantropy starship crashing on an ocean world orbiting Tau Ceti. Withouthope of rescue, survivors modify their genetic material to seed tinyaquatic humans into the world's lakes & puddles & leave amessage engraved on metal plates. Their creations explore theirenvironment, make alliances, invent tools, fight wars with hostilebeings & finally gain dominance over other sentient beings. Theydecipher some of the metal plates. They build a 2" wooden space ship toovercome surface tension & travel to other worlds--the n