An interesting journal.... You may wish to bookmark Marlon's journal. He digs up some very interesting and valuable things and posts them there. I have found it very rewarding. His journal is: https://www.physicsforums.com/journal.php?s=&journalid=13790&action=view One of the most entertaining (and time-conusuming!) links is this one: http://www.vega.org.uk/series/lectures/feynman/ It links you to a series of real-media-encoded lectures that Richard Feynman gave in New Zealand years ago on the subject of Quantum Electro Dynamics (as non-technical as he could manage!). The lectures are pure Feynman, with his inimitable style and charm. You will (guaranteed!) spend hours watching them, to the dismay of your spouse, sibling, or whoever else wants to use the computer. Do not miss this lecture series-at least download them and archive them if you are presently short on free time. At some point, the futures of cosmology and astronomy will hinge on the reconciliation of QED with GR, and what better way for an astronomy nut to be familiarized with quantum threory than through Feynman lectures? I have several Feynman books, but the lecture videos are killer.