Cobalt-60 is a radioactive isotope of the element cobalt, produced artificially in nuclear reactors. It has a half-life of about 5.27 years, meaning it takes that long for half of the isotope to decay. Cobalt-60 emits gamma rays, which are high-energy electromagnetic radiation, making it useful in various applications. One of the primary uses of cobalt-60 is in radiation therapy for treating cancer, where its gamma rays target and destroy malignant cells. Additionally, it is employed in industrial radiography to inspect welds and materials for structural integrity, as well as in food irradiation to eliminate pathogens and extend shelf life.