After years of resisting breakdown, PFAS, the notoriously stubborn "forever chemicals" that can remain in water, soil, and human bodies for decades, may have a newly identified vulnerability. In a new study, scientists found that blasting these forever chemicals with intense ultraviolet light helped to dismantle them. PFAS, short for per- and polyfluoroalkyl substances, are known to be difficult to destroy. They have also been used for decades i…