Giant Fossil Shark Unearthed in Mexico
The creature, believed to have lived approximately 76 million years ago, belonged to the genus Ptychodus, an extinct group of durophagous lamniforms, or mackerel sharks. The team's findings, published in a study in the prestigious journal Proceedings of the Royal Society B: Biological Sciences, describe the specimen as "gigantic," potentially reaching lengths of up to 30 feet, far surpassing its modern relative, the great white shark.