Most people who have reached their eighties without raising children have every right to believe that they will go on not raising them, and Judith and I were no different until the day they turned up with the social worker, neatly scrubbed and pressed inside their vac-suits and carrying cases with all their remaining worldly possessions. There were three of them like stairsteps, their black hair cut in fringes across their foreheads and their dark eyes shining out disconcertingly familiar at me. But it wasn't until the social worker said, "Mr. Chao and Ms. Goldstein, these are your grandchildren, Enid, Richard, and Harry," that I remembered, sheepishly, about the genes we had given all those years ago, to that nice couple from New New Prague, before they left for the Oort Cloud

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