> Although he's in a spell now where he is remaining close to home, my son, Jeff, professor at UCL went to China, Australia, Argentina, Chicago, California, and France (and a couple of other places I forget) in the last couple of years.

Very impressive work. Looking at his CV what also caught my eye is that your son may have worked with the son of Carl Wunsch, who is one of the godfathers of ocean sciences at MIT. Small world