Most of what we know about dinosaurs, we have learned by studying their bones, but that might change very soon.

Recently in the Hell Creek Formation of Montana they’ve found fossilized skin from an extremely well preserved, 67 million year old buckbilled dinosaur.

The near-complete remains may yield precious soft tissue, thanks to a technique that recovered structures resembling blood cells in a Tyrannosaurus rex skeleton in March last year.

"We've only been looking at one thing in the past, the dinosaur skeletal system, but we could learn so much more if we could study their circulatory system and other body systems," Vince Schneider, curator of paleontology at the museum, told Discovery News.

The piece of fossilized skin that was found is preserved in three dimensions, which is extremely rare and it belongs to the adult dinosaurs back right hip.

"The skin appears to have internal structures inside of the scales," Clarke said. "These could be some kind of ligament attachments."

"A CAT scan of the skull, since it's so complete, could reveal the brain cavity, which could then tell us about the shape of its brain," said Richard Kissel, a dinosaur education specialist at the Field Museum in Chicago, who is not involved with the research. "It might then be determined how good the dinosaur's sense of smell and eyesight were."

Clint Boyd, a graduate student at North Carolina State University who helped organize the dig said that they unearthed the dinosaur’s arm without using any preservatives or glue to decrease the chances of contamination.

The paleontologists theorize that such lack of contamination could be why soft tissue was recovered in the Tyrannosaurus rex.

Professor Mary Schweitzer at North Carolina State University developed the dinosaur tissue recovery technique. She has taken samples from the newly found duckbilled dinosaur to study.

"I've only conducted a very preliminary survey, but it's enough to make me curious," Schweitzer told Discovery News, indicating that she may investigate the remains more in future.