Nation Meet the ‘wandering meatloaf’ mollusk. It’s teeth are made from a rare iron, researchers say June 1, 2021 Asha C. Gilbert, USA TODAY Comments Off on Meet the ‘wandering meatloaf’ mollusk. It’s teeth are made from a rare iron, researchers say Researchers at Northwestern University announced the finding of a rare iron mineral in the teeth of a chiton nicknamed the 'wandering meatloaf.'