The teeth of a giant sea monster

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Researchers have discovered the fossilised remains of a "giant sea monster".

Writing in the journal Nature, the scientists have named the creature, which lived 12 million years ago, Leviathan Melvillei.

It is thought to have measured more than 17m long, and scientists think it would have been a ferocious predator.

Here, Dr Christian de Muizon, director of the Paris Natural History Museum, compares the giant's teeth with those of a sperm whale.

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