World's longest cave reveals tiny 'Chipmunk Shark' species with iron nail-like teeth
The US National Park Service announced the identification of a new species of ancient shark, Clavusodens mcginnisi, ...
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Komodo dragons have teeth capped with a layer of iron
The Komodo dragon, one of the planet’s fiercest reptiles, reinforces its teeth with an iron cap - and researchers think some dinosaurs may have had this adaptation too. Komodo dragons (Varanus ...