As a student of Einstein's long history with the quantum questions, (and of his generosity) I really enjoyed the human nuances in this article. Often, the histo

As a student of Einstein's long history with the quantum questions, (and of his generosity) I really enjoyed the human nuances in this article. Often, the history is at least as interesting as the results. Another seldom-raised but interesting topic is electron-capture. (An electrically neutral atom absorbs one of its own inner electrons, changing a proton to a neutron; first observed by Luis Alvarez in the 1930s.) https://en.wikipedia.org/wiki/Electron_capture https://en.wikipedia.org/wiki/Electron_capture