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Helicoprion

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Some paleontologists think Helicoprion's bizarre tooth coil was used to grind away the shells of swallowed mollusks, while others (perhaps influenced by the movie Alien) believe Helicoprion unfurled the coil explosively like a whip, spearing any unfortunate creatures in its path. More about Helicoprion
helicoprion

The teeth of Helicoprion (Wikimedia Commons)

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