The teeth of this ‘wandering meatloaf’ are formed of unusual materials.

You could get lucky and see a “wandering meatloaf,” a circular reddish-brown mollusk also known as the gumboot chiton or, more technically, Cryptochiton stelleri, if you scour the North Pacific shorelines. With its little but extremely gritty teeth, it trudges along coastlines scraping algae off rocks. Scientists discovered that the stylus (the long, hollow structure…