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!!
Mine turned out well printed with support positioned like the STL file.
Original size is about 10cm.