An undated handout shows an illustration of a 50 ft (15 metre) long Jurassic era marine reptile crushing a rival plesiosaur in the Jurassic ocean about 150 million years ago. A giant fossil pliosaur reptile found in the Arctic and known as "Predator X" had a bite that would make T-Rex look feeble, scientists said on March 16, 2009. The pliosaur had a crushing 33,000 lbs (15 tonnes) per square inch bite force, the Natural History Museum of Oslo University said of the new find on the Norwegian Arctic archipelago of Svalbard. REUTERS/Atlantic Zoo/Oslo University/Handout (ANIMALS SOCIETY IMAGE OF THE DAY TOP PICTURE) NO SALES. NO ARCHIVES. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS

London - Dinosaurs suffered painful arthritis, scientists have revealed.

A degenerative condition similar to human arthritis was found in the jaw of a pliosaur – a sea reptile that lived 150 million years ago.

The discovery marks the first time such diseases have been found in fossilised Jurassic reptiles.

A team from Bristol University studied an eight-metre long creature found in Westbury, Wiltshire.

With a crocodile-like head and a whale-like body it hunted fish and was vulnerable only to its own kind.

But it developed an arthritis-like disease which caused its left jaw joint to erode and distort until it broke.

Dr Judyth Sassoon told Tuesday’s Palaeontology journal: “That final accident probably led to her demise.” - Daily Mail