of blood cells and connective tissues in dinosaur fossils. in a more detail how dinosaurs evolved into being warm-blooded creatures. of blood cells and connective tissues in dinosaur fossils. in more detail how dinosaurs evolved into being warm-blooded creatures. Microscopic blood vessels found on the leg bone of a duck-billed dinosaur never fossilized, allowing researchers to study them today. Fossils in Burmese amber are changing what we know about life in The vivid creatures and plants look like they just died yesterday with. Scientists have discovered a tiny wormlike creature that fed on these giants. By Scientific American, adapted by Newsela staff. But the fossil remains of extinct animals have sometimes been taken for dragon Sea to obtain resin from the fruit of the palmlike dragon's blood tree. FOSSIL FIND - Scientists have found remnants that have some similarities to red blood cells and collagen fibres in fragments of dinosaur. eggshell fossils representing three major dinosaur groups and found that these creatures were characterized by warm body temperatures. In a pile of unpromising dinosaur fossils dug up in Canada a century ago, After finding what looked like red blood cells in two of the. Among the surprises was that bone cells, known as osteocytes, and blood vessels were preserved in most of the fossil bone, albeit altered.