Pliosaurs (Walking with Dinosaurs)
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Dorset pliosaur: Colossal 'sea monster' is put on display

In 2009, BBC News reported the exciting discovery of one of the biggest "sea monsters" the Earth has seen.

The skull of the animal - called a pliosaur - was found on the Dorset coast.

Now scientists have cleaned it up to put it on display - and learned a little bit more about it.

Our science reporter Rebecca Morelle explains.

Go to next video: Face-to-face with 'vast sea monster'