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The brachiopod, a 541 million-year-old cockle-like fossil found on the sea bed, absorbed the attention of the palaeontologist Robin Cocks for nearly 60 years. F
<strong>Other lives</strong>: Head of palaeontology at the Natural History Museum and authority on fossil brachiopods
Here's how Panagea formed and what it was like from about 320 million to 195 million years ago.