Much more than trying to focus on the battlefield of the war, it was the central place that German doctors occupied within Nazism, the omnipotent and insane idea of wanting to generically modify an entire nation. This idea was not on the outskirts of Nazi ideology, it was the heart of movement, that's what intrigued me. Mengele is the most extreme expression of this idea.
A slowly moving queue does not move uniformly. Rather, waves of motion pass down the queue. The frequency and amplitude of these waves is inversely related to the speed at which the queue is served.