|Admit it, you want one.|
John Ruben described a pigmented smear within the rib cage of a Sinosauropteryx as the remnants of its liver and went on to describe the liver as existing in a crocodilian form which would have been used to help the animal breathe as a "hepatic piston." Another study determined that the flattened nature of the skeleton means this pigment could be any organ that had been squashed along with the skeleton and therefore identification was not possible. Additionally, pigmentation thought to represent the eye was found in the ocular cavity of the animal. Finding a dinosaur eye would be fantastic and I do not even know what it would mean for science right now. Additionally, there have been reported instances, though not highly publicly available, of the fossils being found with eggs in the body prior to laying and also with lizards in the stomach. Why these are not well known quite yet I cannot fully comprehend, but if the little flashes of information that I have seen about them is all true, these would be an amazing boon for the knowledge of this one genus at least. Part of the reason for this secretive nature may lie in the Chinese government, who, if they are hiding some fossil evidence, is acting like a bunch of hoodlums in depriving paleontologists the ability to study and disseminate information about the skeletons. I am not about to take on the Chinese today though!