Eric Walker added Einsteinium Is Mysterious. Scientists Have Unlocked Some of Its Secrets. - The New York Times to Actinium, and added Actinium to Chemical elements
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