Nothing professionally. I went to school for and worked in electronics, but no longer. Still a hobby, though.

I have always had interests in many subjects of science. Astronomy is probably the oldest, having been studying it for over 20 years. Seismology is running about 10 years now. And to round out what my website covers, I also have an interest in lasers, actively for at least 10 years. Along with learning these subjects comes a lot of physics, both classical and quantum.

I just detailed some of the "alternative" subjects on my bookshelf to Cal, but it also includes many books on the above subjects in addition to things like programming, cryptology, fractals and chaos, and numbers (not to be confused with numerology). Among the books are some by Hawking, Sagan, Feynman, and Einstein.

Does that help answer your question?

Brian