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More than half a billion years ago, the first shell-crushing predators ground up their prey between their legs

By Russell Dean Christopher Bicknell, Post-doctoral researcher in Palaeobiology , University of New England
James D. Holmes, University of Adelaide
John Paterson, Professor of Earth Sciences, University of New England

Looking a bit like enlarged woodlice, ancient trilobites crawled along the seabed and had an exoskeleton made of calcite — nature's version of a suit of armour.

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