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Limpet teeth 'beat spider silk' in strength test

Engineers in the UK have found that limpets' teeth consist of the strongest biological material ever tested.

Limpets use a tongue bristling with tiny teeth to scrape food off rocks and into their mouths, often swallowing particles of rock in the process.

The teeth are made of a mineral-protein composite, which the researchers tested in tiny fragments in the laboratory.

They found it was stronger than spider silk, as well as all but the very strongest of man-made materials.

Duncan Kennedy reports.

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