Otodus megalodon, the largest shark to ever swim in our planet’s oceans according to a new study, … [+] According to a new study, the megatooth shark Otodus megalodon was the largest shark to ever swim in our planet’s oceans. O. megalodon is an extinct species of shark that lived approximately 23 to 3.6 million years ago. The exact cause of its extinction is still debated, likely a combination of environmental change and competition with smaller shark species played a role. Despite its fame in pop-culture, surprisingly little is known about the life-appearance of the megalodon. Sharks have a cartilaginous skeleton that will quickly decay after death. Only their hard teeth survive the fossilization process. A recent study published in the journal Scientific Reports discussing the body size of O. megalodon, concluded that a full-grown specimen could reach about 50 feet (or 15 meters) in length. A new study published in the journal Historical Biology shows how unique the size of this species was. Fossil 6-inch megalodon tooth compared to a recent-day 2-inch great white shark tooth. Kenshu Shimada, a paleobiologist at DePaul University in Chicago and lead author of the study, compiled a database of 70 shark species […]

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