Following the reading of this past week’s Torah portion, which introduced the commandment to wear tzitzit, Nachum hosted Dr Baruch Sterman on this morning’s JM in the AM to discuss tekhelet (blue dye for the tzitzit) and the Dr’s book on the subject entitled “The Rarest Blue.” Dr. Sterman was instrumental in developing the modern techniques for dyeing tekhelet used by the Ptil Tekhelet Association today. These techniques take into account the halakhic, as well as the physical and chemical requirements needed for mass production. He has published numerous articles on the scientific and halakhic aspects of Tekhelet, and writes extensively on the topic of Science and Torah in general.