Apparently she worked for years as cabin crew. Cabin crew do get subjected to more mutating cosmic radiation than other people. Some routes are worse than othe

Apparently she worked for years as cabin crew. Cabin crew do get subjected to more mutating cosmic radiation than other people. Some routes are worse than others of course: the worst are the ones over the North Pole (Europe-Alaska or Europe-Japan/Korea/Beijing) where the Earth's protecting magnetic field is weaker. I've been told that one such flight provides a dosage about equivalent to that of a CT-scan. Imagine doing that every day.