A 3D scan downloaded from https://www.thingiverse.com/thing:1380493 From the site: "Like the name suggest, this is a scanned tooth of an extinct Megalodon giant shark. Special thanks to www.lamna.se for loaning me the original fossil. It was scanned using a semi-pro DSLR-camera and trialversion of Agisoft Photoscan (It's like magic!!). Edited with meshlab and Sketchup. Enjoy!!"
To zoom in and out use the scroll wheel on your mouse while hovering over the 3D image. Hold left click on the 3D image and drag the mouse to rotate.