We live in a radioactive world. Every minute, 7,000 potentially cell-damaging radioactive releases occur in our bodies. How are we still alive? And what are the real risks associated with radiation?

In this episode, Dr. Keefer is joined by Dr. Douglas Boreham, a world expert in the effects of low doses of ionizing radiation, to tackle the biological effects of radiation.

They discuss various types of radiation; the linear no-threshold hypothesis; fears of airborne "hot particles" of uranium; our bodies' sophisticated cellular repair mechanisms; the surprising mechanics behind cell damage from radiation; the elusive idea of hormesis; and the "choreography of fear" that comes from an abundance of caution at nuclear plants.

Dr. Douglas Boreham is a Professor and the Division Head of Medical Sciences at the Northern Ontario School of Medicine, as well as a Professor in the Department of Medical Physics and Applied Radiation Sciences at McMaster University. He has 35 years of experience researching the biological effects of environmental and medical exposure to low doses of ionizing radiation.