Kodak Detected the First Atomic Bomb Test Because Its Film Kept Fogging
A batch of packaging board made at a mill on the Wabash River on August 6, 1945 came out radioactive, and the X-ray film stacked against it fogged after roughly two weeks in the box. A physicist at Eastman Kodak worked backward from those spots to a bomb test about 1,000 miles away in the New Mexico desert. He then sat on the finding for four years before publishing it.