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424 million year old fossil

Image   •   Oct 17, 2016 16:00 BST

Remember dropping your milk teeth? Ín your hand was only the enamel-covered crown: the entire root of the tooth had somehow disappeared. In a paper published in Nature, a team of researchers apply synchrotron x-ray tomography to a tiny jawbone of a 424 million year old fossil fish in order to illuminate the origin of this strange system of tooth replacement.
License Creative Commons Attribution, no derivatives (?)
Size 4.9 MB
Format .jpg
Image dimensions 3780 x 2846 pixels