I am a person who is fascinated by knowledge intersections. Intersections come when luminaries of the same field meet, or, even more remarkably, when luminaries of different fields meet, and find some commonality in their chosen metiers that shows a a unity or a common thread between two seemingly different disciplines. I have the feeling author Craig Brown must be the same sort of chap since his recent book Hello Goodbye Hello chronicles 101 remarkable meetings, or, intersections. He chronicles meetings between Twain and Kipling et al. The meeting that I found most remarkable was the day Helen Keller visited Martha Graham’s studio (via [brainpickings.