2013 Event Palestinian investigators claim their former leader, Yasser Arafat, did not die of old age or ill health; they believe Israel killed him because his exhumed body contained high levels of the radioactive element polonium-210 1994 Event Darmstadt creates element 110 1961 Event U.S. element 103 (Lawrencium) discovered 1961 Event Element 103, Lawrencium, 1st produced in Berkeley California 1957 Event Discovery of element 102 (Nobelium) announced 1955 Event Element 101, Mendelevium, announced 1950 Event Element 98 (Californium) announced 1940 Event Discovery of element 93, neptunium, announced 1905 Birthday Emilio Segre, born in Tivoli, Italy, physicist, Nobel Prize in Physics, discovered antiprotons, a sub-atomic antiparticle and an element used for Fat Man atomic bomb used on Nagasaki 1902 Event Marie and Pierre Curie isolate radioactive element radium 1902 Event Marie and Pierre Curie isolated the radioactive element radium
