Empty mollusc shells served as ocean's first ready-made homes 470 million years ago
Around 470 million years ago, ancient mollusc shells began functioning as habitats for small marine creatures, marking a significant ecological shift in ocean ecosystems worldwide. These vacant shells provided shelter and attachment surfaces for tiny sea animals seeking protection. The physical shape and structure of the shells directly influenced the size and diversity of the communities that formed within them. This early adaptive behavior is considered a foundational development that helped shape the complex oceanic ecosystems seen today.
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