Eric Walker added Cloud Wars: Mideast Rivalries Rise Along a New Front - The New York Times to Silver iodide, and added Silver iodide to Silver and Iodine
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 Radioactivity is blowing in the air | The Independent Barents Observer to Iodine-131, and added Iodine-131 to Iodine
Eric Walker added Silver iodide and Iodine-131 and Has there been any measurable increase in Goiters as sea salt becomes more popular? : askscience to Iodine, and added Iodine to Chemical elements