What is a seashell?

Have you ever picked up a beautiful, swirly seashell on the beach and wondered where it came from? It wasn't just a rock shaped by the ocean waves—it was built by a squishy sea creature! Join Mira and Finn as they dive underwater to discover the amazing world of molluscs. Learn how snails, clams, and oysters use a magical organ called a mantle to literally 3D-print their very own rock-hard armor out of ocean water! Did you know a baby snail is born already wearing its tiny shell and never she...