Photo: "Sea Monster" Bones Reveal Ancient Shark Feeding Frenzy



Fossil bones of a prehistoric reptile known as a plesiosaur were found embedded with dozens of shark teeth (left). Based on the number and sizes of teeth found, researchers said in September 2009 that up to seven sharks likely bit into the ancient "sea monster" (above right, the estimated positions of attacking sharks based on where teeth were found on the plesiosaur's bones.

Pictures courtesy Kenshu Shimada


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