For what it's worth, Richard encouraged his sister Joan to earn a Ph.D. in physics. She worked for years as an astrophysicist at the Jet Propulsion Laboratory i

For what it's worth, Richard encouraged his sister Joan to earn a Ph.D. in physics. She worked for years as an astrophysicist at the Jet Propulsion Laboratory in Pasadena. I had the good fortune of having Joan present at my first scientific talk way back in 1994. I was confused on one point, and she patiently explained to me how a magnetotail extending to infinity could still satisfy div B = 0.