Nuclear explosions. The first 3 are high-speed photos by Harold “Doc” Edgerton, taken during the first three milliseconds of Trinity test, July 16, 1945. The next photo is 0.016 seconds after an explosion at Trinity Site, July 16, 1945. The last set are from the ‘Baker Day’ blast at Bikini Island in the Pacific, on July 25, 1946. Via io9.