Eric Walker added Pair-instability supernova - Wikipedia to Pair-instability supernovae
Eric Walker added These Black Holes Shouldn’t Exist, but There They Are - The New York Times to a number of topics
Eric Walker added Pair-instability supernovae and Pair production - Wikipedia to Electron-positron pair production, and added Electron-positron pair production to Positrons, Pair production and Electrons
Eric Walker added SN2016iet, Pair-instability supernovae and Type II supernovae and a number of links to Supernovae, and added Supernovae to Stars