Template:Are You Sure/February 24

[[File:The Tortoise Trainer by Osman Hamdi Bey (early 20th century).jpg|thumb|175px|link=The Tortoise Trainer (nonfiction)|[[File:Katherine_Johnson_at_NASA_(1966).jpg|link=Katherine Johnson (nonfiction)|2020: Physicist and mathematician Katherine Johnson dies. Johnson computed orbital mechanics as a NASA employee which were critical to the success of the first and subsequent U.S. crewed spaceflights; she also helped pioneer the use of computers to perform these tasks. |The Tortoise Trainer]] by Osman Hamdi Bey, Pera Museum, Istanbul.]]

• ... that chemist Glenn Seaborg was the principal or co-discoverer of ten elements: plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium and element 106, which, while he was still living, was named seaborgium in his honor; that Seaborg also discovered more than 100 atomic isotopes and is credited with important contributions to the chemistry of plutonium, originally as part of the Manhattan Project, where he developed the extraction process used to isolate the plutonium fuel for the second atomic bomb; and that advised ten US Presidents – from Harry S. Truman to Bill Clinton – on nuclear policy and was Chairman of the United States Atomic Energy Commission from 1961 to 1971, where he pushed for commercial nuclear energy and the peaceful applications of nuclear science; and that throughout his career, Seaborg worked for arms control. He was a signatory to the Franck Report and contributed to the Limited Test Ban Treaty, the Nuclear Non-Proliferation Treaty and the Comprehensive Test Ban Treaty?