SOME of the mysteries of Dorset's historic Jurassic Coast will be unveiled today in the last of the current Channel 4 series, 'Walking Through Time'. (OCT 8)

Presenter Dr Tori Herridge of the Natural History Museum, walks from the 150 million year old cliffs of Kimmeridge in Dorset back through time to the even older red cliffs of Budleigh Salterton in East Devon.

Along the way she encounters the biggest sea predator ever to have lived and a global disaster that nearly destroyed life on our planet.

Tori says it was her first visit to the World Heritage Site and one of the highlights of the series.

"It is such a beautiful area. We had really good weather most of the time and the variety of the coastline was incredible - there was also a supply of excellent tea shops which was invaluable too."

The Jurassic Coast was also the place where Tori found her first British fossil.

"I had never found a fossil in this country until we started filming for this show as all my research has previously been based in the Mediterranean," she explains.

"But the Jurassic Coast is so rich in fossils that there's a good chance that you might find something quite extraordinary if you keep your eyes peeled."

Tori is keen to encourage everyone to become amateur paleontologists.

"Viewers will be surprised at how important the amateur is to paleontology in Britain.There are so many stories of the ordinary dog walker or local enthusiast making some really important discoveries."

But she urges anyone who does find a fossil not just to "squirrel it away".

She adds: "It is important to make an effort to record where you found it by taking a photograph and taking it to local museum or the Natural History Museum."

'Walking Through Time' is on Channel 4 at 8pm on Saturday October 8.