Glen T. Seaborg was a Swedish-American nuclear chemist who was awarded the Nobel Prize in chemistry for the discovery of ‘Plutonium’. He shared the prize with another scientist, Edwin M. McMillan. Till that time Uranium was thought to be the heaviest metal in the Periodic Table. He and others worked together to discover the ‘trans-uranium elements’ including ‘element 94’ and more than 1000 other isotopes which changed Dmitry Mendeleev’s 1869 Periodic table significantly. He suggested the ‘actinide concept’ of the electronic structure of heavy elements that provided the relationship between the actinides and other elements in the Periodic table. Seaborg and his colleagues discovered nine more new ‘transuranium elements; such as americium, berkelium, curium, californium, fermium, einsteinium, nobelium, and mendelevium. The ninth element ‘element 106’ was named ‘seaborgium’ in his honor which was the first instance of an element to be named after a living person. He was not only famous for fundamental research in nuclear chemistry but also strongly supported and was committed to the education of science. He discovered radioisotopes like ‘cobalt-60’ and ‘iodine-131’ which are used to treat life-threatening diseases. He was an adviser to ten Presidents starting from Franklin D. Roosevelt to George H. W. Bush.