A LOCH Ness Monster theory which suggests the creature is a living dinosaur has been dealt a blow by scientists. Many believe that Nessie is a plesiosaur, a long-necked marine reptile which sought refuge in Scotland's second-largest freshwater loch when most of the species died out 160 million years ago. But Dr Leslie Noe, a palaeontologist at Cambridge University's Sedgwick Museum, discovered that the plesiosaur would have been unable to lift its head up, swan-like, out of the water. Most scientists believe the creatures became extinct with the other dinosaurs, but some insist it is possible that after the last...