Around 3.6 million years ago the largest predatory shark (we think) to ever roam the planet died out, or did it? If you have ever heard the fact that humans have 'only explored 5% of the oceans'? You're not alone, the fact is the number is probably closer to 15%, that still leaves a whole lot of space, but could that be enough space for a predatory animal the size of 2 school buses to roam the oceans?