Giant prehistoric pterosaurs descend on London

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Five models of giant prehistoric creatures have been unveiled at the South Bank in London as part of the Royal Society's Summer Exhibition.

Over the past 12 months, the BBC has been following researchers from the University of Portsmouth as they have been have been building life-size replicas of the flying pterosaurs.

These beasts dominated the skies from the late Triassic to the end of the Cretaceous Period (220 to 65.5 million years ago).

Creating the models has brought about a whole host of scientific, technical and engineering challenges, as palaeontologist Professor Dave Martill explains as the flying monsters finally go on display.

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