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Ancient Megalodons May Have Dueled One Another With Their Teeth
Megalodon teeth are the largest shark teeth ever found and have sharp serrated edges. So when these sharks bit marine mammals ...
National Geographic news12y
Protostega Gigas
Growing more than 10 feet (3 meters) long, Protostega was among the largest ... Shark teeth embedded in Protostega bones housed at a museum in Chicago suggest the turtles were sometimes a meal ...