Today in History is a daily newsletter from Britannica. (more) Today in History—March 6: The Introduction of the Periodic Table Written by Michele Metych Michele Metych is the lead editor for Today in History at Encyclopædia Britannica. Michele Metych Fact-checked by Britannica Editors Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Britannica Editors Last updated Mar. 2, 2026 •History On this day in 1869, Russian chemist Dmitri Mendeleev took a break from improving cheese-making techniques to show the world how he’d rearranged the known universe. Today in History is a daily newsletter from Britannica.Encyclopædia Britannica, Inc. Want to learn more about what happened on March 6, or any other day of the year? Sign up to receive the newsletter in your inbox every morning. His paper, “The Dependence Between the Properties of the Atomic Weights of...

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