Ancestry of polar bears traced to Ireland

An international team of scientists has discovered that the female ancestor of all living polar bears was a brown bear that lived in the vicinity of present-day Britain and Ireland just prior to the peak of the last ice age ...

Eliminating tooth decay: Breakthrough in dental plaque research

Dutch professors Bauke Dijkstra and Lubbert Dijkhuizen have deciphered the structure and functional mechanism of the glucansucrase enzyme that is responsible for dental plaque sticking to teeth. This knowledge will stimulate ...

Lungfish teeth could hold key to better cars, planes

(PhysOrg.com) -- The tooth enamel of lungfish and garfish could provide the basis for new material to make lighter more efficient aircraft or vehicles, says a Queensland University of Technology (QUT) physics researcher.

Sea Urchins' Digging Teeth are Designed to Stay Sharp

(PhysOrg.com) -- Sea urchins dig themselves hiding holes in the limestone of the ocean floor using teeth that don’t go blunt. Weizmann Institute scientists have now revealed their secrets, which might give engineers insights ...