Eric Walker added a number of topics and We found a new type of stellar explosion that could explain a 13-billion-year-old mystery of the Milky Way's elements and Is It Time to Upend the Periodic Table? - The New York Times to Chemical elements, and added Chemical elements to Chemistry and Atoms, molecules, chemicals, minerals, materials and compounds
Eric Walker added New “whirling” state of matter discovered in an element of the periodic table - Radboud University to Neodymium, and added Neodymium to Chemical elements