Just found a website featuring string theorist Brian Greene that is very entertaining, not to mention educational. In it Brian answers questions (via short video clips) on every conceivable subject concerning Quantum Mechanics, Relativity, Dark Matter/Energy, String Theory, etc. The questions are answered in video clips that are about 1 minute each in duration, so what you can get out of this site at the very least are short, comprehensive answers to the questions we all get now and again.
In addition, free classes on these subjects are available at the site.
I think it's a great idea. You will, too. Here is the link:
World Science University