Used book in Good condition. Some writing and underlining on a couple of pages in the book. Additional Details ------------------------------ Subject keyword: Twins; Birth; Human; Century; Identical; Monozygotic; Scientific; Pairs; Brother; Sister; Data; Scientists; Research; Parents; Relationship; Biological; Stories; Modern; History; Nature; Cultural; Genetic; Studies; Technology; Animal; Conjoined twins; Ancient; Embryos; Story; Gods; Traditions; Dizygotic; Creation; Family; Sperm; Individuals; Evidence; Medical; Researchers; Health; Sexual; Twin births; Populations; Religious; Cultures; Power; Communities; Laboratory; Fertility; Societies; Visual; Police; Cells; Death; Eggs; Film; Historical; Comparison; Audiences; Bertillon; Colonial; Criminal; Systems; Mothers; Series; Silvia; Legal; Thousands; Twinsburg; Artemis