Ergot, a fungus that grows on wheat and rye, can literally send you mad - eating bread made from affected flour is likely to have contributed to mass hallucinations in medieval Europe.

麦角菌是一种生长在小麦和黑麦上的真菌，它真的会让你发疯——在中世纪的欧洲，吃用受影响的面粉制成的面包很可能会导致集体幻觉。