Toothless pterosaurs were once a worldwide presence

August 19, 2014 6:02 PM

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A new study suggests that the shift from toothy pterosaurs to toothless ones may have signaled an important change in the ecosystem of the Earth more than 60 million years ago.(Photo : Wikimedia Commons, Mark Witton and Darren Naish)

A new study suggests that the shift from toothy pterosaurs to toothless ones may have signaled an important change in the ecosystem of the Earth more than 60 million years ago.

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