A hummingbird mid-flight, a bullet piercing an apple, and a drop of milk forming a crown-like splash, are all images never seen by the human eye until the late MIT professor Harold “Doc” Edgerton captured them. Having transformed the stroboscope from a laboratory instrument into an everyday device, he is considered the father of modern high-speed photography — affectionately known by his students and staff as “Doc,” and as “Papa Flash” by Jacques Cousteau and the crew of their vessel Calypso. Hundreds of Edgerton’s images and his fascinating notebooks are…