This study tracked radioactive contamination in King Bolete mushrooms across Poland over 25 years following the 1986 Chernobyl nuclear accident. Researchers found that radioactive caesium levels were highest 10-20 years after the accident, peaking in the 1990s, because radioactive particles slowly moved deeper into soil where mushroom roots feed. While people who eat wild mushrooms from Poland were exposed to some radioactivity, serious health risks were uncommon, and contamination has significantly decreased in recent years.