AI: Archaeologists have discovered a cache of black henbane seeds in an animal bone in the Netherlands. Black henbane is a poisonous plant that was used medicinally in ancient Rome to treat various diseases. The find indicates that people at this site collected, used and possibly grew this plant. Ancient authors mentioned black henbane in their works as a remedy for various ailments, but warned of possible hallucinogenic effects when taken in too large doses. This discovery confirms the spread of medical knowledge in Ancient Rome far beyond the borders of Italy.