Interesting Animal - The Limpet

Research carried out in the UK has revealed that nature's strongest biological material is to be found in the teeth of a limpet.

(The publication, in the Royal Society's journal Interface, says that the teeth are made of a mineral-protein composite, which was found not only to be stronger than spider silk, but the very strongest of man-made materials too: stronger than Kevlar fibres and almost as good as the best high-performance carbon fibre materials.

The idiom to stick or cling like a limpet, makes more sense now: it means to refuse to let go of something or someone.)