I enjoyed like nothing else working in pure math, discovering new formulas.

I spent more than 20 years of my professional career researching and developing renewable energy sources.

In 2004, I ran for Congress and lost. In 2006, I ran again and won - defeating Richard Pombo, a seven-term Republican incumbent.

I spent 10 years working on a math Ph.D., and I finally got kind of good at it.

I enjoyed like nothing else working in pure math, discovering new formulas.