In the Lagerstätte fossil beds of Vallecillo in Mexico, paleontologists have made the find of a lifetime: several exceptionally well preserved fossils of an extinct genus called Ptychodus.

Fossil teeth from sharks in the genus Ptychodus have made their way into museums for over 200 years, and while some members ...

Ptychography reconstructions of architecture of moth wings Ptychography reconstructions of architecture of moth wings Ptychography reconstructions of architecture of moth wings a Ptychography ...