Rabbi Dr. Norman Lamm discusses tekhelet; its origins and history, its biology and chemistry, and halakhic issues. He discusses the cuttlefish theory of the Radziner Rebbe, Gershon Ḥanokh Henikh L... Show moreRabbi Dr. Norman Lamm discusses tekhelet; its origins and history, its biology and chemistry, and halakhic issues. He discusses the cuttlefish theory of the Radziner Rebbe, Gershon Ḥanokh Henikh Leiner. Show less
