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The lack of source material makes it challenging, but this short book uses the available evidence to present facts and debates around Jews in late antiquity and to provide a first step towards the understanding of this little-known period in Jewish history. It focuses on seven different regions: Italy, North Africa (except Egypt), Gaul, Spain, Egypt, the Land of Israel, and Babylonia.

Since antiquity, Book 8 of Thucydides' History has been considered an unpolished draft which lacks revision.Even those who admit that the book has some elements of internal coherence believe that Thucydides, if death had not prevented him, would have improved many chapters or even the whole structure of the book.

Two strains of the well-known insect pathogen and biopesticide, Bacillus thuringiensis (Bt), belonging to subspecies alesti (strain Bt5) and kurstaki (strain Bt213), were chosen for genetic characterization. The two strains belong to different serotypes and are currently classified into different subspecies, although their insecticidal activity is similar. Physical maps were constructed of Bt alesti and Bt kurstaki using Pulsed Field Gel Electrophoreses (PFGE), and the map positions of several genes were determined. The 5.5 Mb combined genetic and physical chromosome maps of the two strains were found to be indistinguishable, and the only differences detected between the strains were of extrachromosomal origin. A cryIA toxin gene probe hybridised to a chromosome fragment and to two extrachromosomal elements in both strains, migrating as 100 kb and 350 kb, respectively. In addition a cry hybridizing extrachromosomal element migrating as 80 kb was present only in Bt alesti. Both strains were also found to contain sequences hybridizing to an enterotoxin (hbla) gene probe. Such sequences were positioned on the 350 kb extrachromosomal element, as well as on the chromosome.