Earthbound Radiation
More radiation emanates from natural land-based sources than from the sky. Radon, the gaseous descendant of earthbound natural uranium, concentrates in enclosed areas, such as houses.
Soil-based radiation comes from surface rocks, granite in particular, which totes radioactive elements dating from the formation of the planet. Water and foods consumed have bits of radioactive elements. Finally, potassium-40, naturally present in human tissue, completes the story of radiation coming from everywhere. It’s a miracle anything lives, what with all the atomic noise going on.
