The technologies in our next cluster are biological. Two–paternity testing and in vitro fertilization–have already abolished several of the facts on which the past thousand years of family law are based. It is no longer only a wise child who knows his father–any child can do it, given access to tissue samples and a decent lab. And it is no longer the case that the woman from whose body an infant is born is necessarily its mother.  The law has begun to adjust. One interesting question that remains is to what degree we will restructure our mating patterns to take advantage of changes in the technology of producing babies.