Beaver Teeth Aren’t Orange Because of Iron. Here’s the Truth.
We’ve all been taught that beaver teeth are orange because they contain iron. Itโs a neat, logical story. But itโs a lie. Recent nanoscale research reveals that the iron in their enamel acts as an acid-resistant armor, completely decoupled from the tooth’s color. The actual orange pigment comes from an ultra-thin surface layer whose exact chemical makeup remains an unsolved mystery.