I have been printing some more Megalodon  shark tooth fossils based off the scanned model found here:  http://www.thingiverse.com/thing:...

This image is of a  Dalmanites reussi  (Barrande) trilobite pygidium fossil from the Devonian Period. Found in the Tétin Czech Republic. ...

This image is of a Dalmanites dufouri  (Tromelin & Leb.) trilobite fossil from the Ordovician Period. Found in the Guichen Ille-et-Vi...