GIA4766622: The cobalt bomb against cancer. Gamma rays, those emitted during nuclear explosions, are today used in the treatment of malignant tumours thanks to the radiation produced by cobalt. After Canadian experiments, Italy launched into these therapies, which require very expensive equipment. Ill. by W. Molino. ""La Domenica del corriere"". 11/10/1953., Molino, Walter (1915-1997) / Bridgeman Images