Paul Ulrich Villard (1860 – 13 January 1934) was a French chemist and physicist, born in Saint-Germain-au-Mont-d'Or 28th of september 1860, France. He discovered gamma rays in 1900 while studying uranium and radium. At this time he was working in the chemistry department of the École Normale in rue d'Ulm, Paris. He was elected as a member of the Académie des sciences in 1908.
He died in Bayonne, France in January 13 1934.
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