In the 45th installment of The Atomic Exchange Podcast, co-hosts Dr. Goran Calic and Michael Tadrous take a deep, practical look at radon. They explain what radon is and how it harms, why winter readings run higher than summer, and how long-term lab tests compare to continuous monitors. Then they separate home exposure from miner studies, translate working-level months into everyday Bq/m³, and walk through large U.S., Danish, and multi-country European studies to see where risk actually shows up. The episode closes with clear takeaways on when to test, what thresholds matter in practice, how to think about mitigation, and why health policy can drift from the underlying evidence.