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Brachiopods are some of the most common fossils to be found in rocks worldwide. Their thick, hard and (often) calcareous shells make them preferentially preserved in the fossil record. We probably all have found one, but how many of us overlooked them at the time? What can a brachiopod tell us? How big a role have they played throughout geological time?

In this two-part episode we speak to Prof. Lars Holmer, University Uppsala, Sweden, all about the humble brachiopod.