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A fossilized rib from a ferocious, extinct whale was discovered in a creek bank in Yazoo County, Mississippi.

The rib belonged to a zygorhiza, a toothed whale that lived 34 to 38 million years ago and grew up to 18 feet long.

Whale fossils are found in Mississippi because the area was once submerged under an ancient arm of the Gulf of Mexico.

Zygorhizas were fearsome predators with serrated teeth for tearing apart prey, unlike modern dolphins.

It was just a small piece of bone sticking out of the bank of a creek .

After digging it up, it turned out to be a fossilized rib from a ferocious whale that once called Mississippi home, but suddenly went extinct 34 million years ago.

"I was just walking along and saw it sticking out of the bank," said Robbie Ellwanger

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