Needing advice on underwater photography, oceanographic researcher Jacques-Yves Cousteau went looking for MIT Professor Harold "Doc" Edgerton. With Cousteau, Edgerton produced the first underwater time-lapse photography and developed side-scan sonar technology. Used to scan the sea floor for wrecks, side-scan sonar technology was responsible for finding the Titanic as well as many other shipwrecks. Video footage includes Cousteau testing Edgerton's underwater camera and flash in a MIT pool and Edgerton working on the research vessel, Calypso. Watch this video in its entirety at the From the Vault collection.