The Nelson twins, Gunnar and Matthew Nelson, reflect on their father Ricky Nelson’s final call and legacy, and discuss their new memoir, "What Happened to Your Hair?." The mass media’s blind spot on ...

IN 1937, Perrier and Segrè showed that radioactive isotopes of element 43 could be formed by neutron or deuteron bombardment of molybdenum 1. Several chemical properties of element 43 were established ...

Aranan Tarih Aralığı: 2026-1-16 / 2026-01-17 Aranan Kelime: goal learn to declare multi dimensional arrays assignment to assist a national park in monitoring wildlife movements a system is needed to ...

Planet or Plastic? is National Geographic’s multiyear effort to raise awareness about the global plastic trash crisis. Come to this page often to learn more, and find out what you can do to reduce ...

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IN 1940, we prepared the isotope of mass 211 of element 85 by bombarding bismuth with alpha particles accelerated in the 60-in. cyclotron of the Radiation Laboratory of the University of California 1.