We are exposed to ionizing radiation more often than we think: when we bathe in the sun, which emits UV rays, or when we get X-rayed. Even when we are traveling on an intercontinental flight, which reaches 10,000 meters above sea level. This type of radiation is potentially harmful for DNA because it can damage it, break its structure or modify it, leading to the formation of tumors.
Click here for original story, The link between the impact of radiation on DNA and the time in which the damaged molecule breaks irreversibly revealed
Source: Phys.org