Meet the megalodon shark - one of the most feared predators in Earth's history! Roaming the oceans 2 to 30 million years ago, megalodon reached 20 meters (65 feet) in length, dwarfing the modern great white (a mere 6 meters). Armed with more than 250 giant teeth, megalodon was capable of devouring whales. This terrifying creature is long extinct, but fossil teeth testifying to its size and ferocity are found regularly. The current record size for meg tooth is a monstrous 18.75 centimeters (7 3/8 inches; video here: http://youtu.be/TUyWbW3yKFI).
With the accompanying file, you can print your own high-resolution replica of a real 15 centimeter (4 1/2 inch) megalodon tooth. It even comes with a stand!
This is a simple print that takes about 4 hours on a Makerbot Replicator. I recommend printing in white so it looks like a real tooth! If you prefer not to use the stand, which provides support during the build, just cut it off with a utility knife.
Edit: An *.stl file featuring a stronger base, which is a little easier to print, is now available.