The monarch butter ̄y controversy: scienti®c interpretations of a phenomenon

The future development and use of agricultural biotechnology has been challenged by two preliminary studies indicating potential risk to monarch butter ̄y populations by pollen from corn engineered to express proteins from Bacillus thuringiensis. Likewise, these studies have also challenged the way in which science should be performed, published in scienti®c journals and communicated to the public at large. Herein, we provide a history of the monarch controversy to date. We believe a retrospective view may be useful for providing insights into the proper roles and responsibilities of scientists, the media and public agencies and the consequences when they go awry.