Just joined. I've been slowly working my way through Susskind's Theoretical Minimum books, so I'll be looking for discussions of those and his lectures on the same topics. I have a lot of scientific interests, including fundamental physics, mathematical biology, economic geology, electronics & geophysical prospecting, mathematics & Mathematica. I'm a ret'd biophysical chemist, but there's little there for me now except maybe molecular dynamics applied to biological macromolecules.. I probably will look at the homework requests now and then. I find that solving these and providing hints to solution seekers can be educational, and a good refresher. As I mentioned, I'm interested in Mathematica. I've used it professionally but there's a lot more to it than I understand yet. If I find discussions here that are relevant to using MMA to do physics problems, I'll take part. I've been toying with the idea of developing a citizen science program here in Corvallis, OR. Any suggestions would be welcome.