3.5 million-year-old megalodon tooth fossil found in deep sea, a first

 A rare megalodon tooth found in the deep sea

 The discovery of the tooth

A team of researchers has reported the first ever finding of a fossilized tooth of a megalodon, the largest shark that ever lived, in its original position on the seafloor. The tooth was spotted by a remotely operated submersible at a depth of 3,000 meters (or 1.9 miles) in the Pacific Ocean, southwest of Hawaii.

The features of the tooth

The tooth was partially embedded in the ocean floor, among a rocky outcrop. It had a broken tip and serrated edges that were remarkably sharp, indicating that it had not been moved or eroded by water currents. The tooth was also partially covered by manganese, a mineral that forms over long periods of time.

 The age and size of the tooth

The tooth belonged to a megalodon, a giant shark that roamed the world's oceans between 4 and 20 million years ago. Megalodon was a fearsome predator that could eat modern sharks in a few bites. Its body was mostly made of soft tissue and cartilage, which did not fossilize well. Therefore, most of what we know about megalodon comes from its teeth and vertebrae, which were hard and durable. The tooth found in the deep sea was estimated to be at least 3.6 million years old, based on the extinction date of megalodon. It was not very large, compared to other megalodon teeth, measuring only 63-68 millimeters (or 2.5-2.6 inches).

 The significance of the finding

The finding of the tooth was a rare and valuable one, as it was the first one to be documented in its original location on the seafloor. Most megalodon teeth are found on beaches, in whale bones, or in ancient sediments that were once underwater. The tooth revealed new information about the distribution and habitat of megalodon, as well as the conditions of the deep sea. The researchers who found the tooth used historical records to identify other megalodon teeth that had been collected from the deep sea, ranging from 350 to 5,570 meters in depth. They emphasized the importance of using advanced deep-diving technologies to explore the vast and mysterious realm of the deep sea.