Happy shark week, shark lovers!

Believe it or not, nearly 270 million years ago, Idaho was home to what was the largest predator on Earth at the time - the Helicoprion, also known as, the Buzzsaw Shark.

We know this thanks to some fossils that were discovered a few years back at a Monsanto mine in eastern Idaho. The fossil was that of a tooth whorl that measured over 8 inches in diameter! Imagining an 8 inch tooth on a shark is a scary thought. For better perspective, 8 inches is slightly smaller than an NBA basketball.

This leaves researchers at The Idaho Museum of Natural History to believe that the prehistoric Buzzsaw Shark was a ginormous cold blooded fish that could possibly grow up to 25 feet! The Helicorprion actually gets it's nickname because of it's oral anatomy which has been described as a "360-degree spiral of teeth." Take a look at this drawing to get a visual!

It was previously believed that this spiral of teeth curled outward. Somehow even more terrifying though, the whorl actually grew inside the shark's lower jaw. That means this shark basically had a whole collection of teeth tucked inside it's mouth - sometimes up to 150 teeth! When new teeth would grow in the back of the shark's mouth the entire whorl rotated forward to make room. Yep, that's right. That's a rotating whorl of 8 inch razor-sharp teeth, just like chainsaw. Interestingly enough, all these chompers were actually in the bottom jaw of the shark's mouth; there were none in it's upper.

The Buzzsaw Shark is something straight out of a nightmare. If these things were still swimming around in Idaho, catch me in the water like NEVER!

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