The main idea of the Reading is that bones of dinosaurs to prove that the dinosaurs’ blood vessels, blood cells, and bone marrow are generated from the bones. However, lecture oppose this hypothesis by saying it is unconvincing.

Firstly, in the reading, the soil where dinosaur bones have been discovered. Red material has been noted inside bones, suggesting a circulatory system functionally the same as found in today’s animals. Knowledge of such a network of veins permits important hypothesis about the dinosaur’s circulatory system. However, listening gives an example of nosebleed try to make point of color can be change overtime. Therefore, we can’t be expected to believe dinosaur blood, and only dinosaur blood, stays bright red for millions of years.  

The second of evidence makes even bolder inferences. Paleontologists point to the existence of tiny iron spheres near some dinosaur bones. Since hemoglobin in the red blood cell is a material rich in iron, they claim that they are the residue of the dinosaur’s red blood cells. This suggests that its body chemistry is closely akin to today’s animals. On the other hand, the lecture oppose that the tiny iron find in dinosaur are found in other spices of animal as well. The tiny iron spheres can be formed by colonies of bacteria after dinosaurs died out.It that’s the case, the evidence might be left by the bacteria that ate the dead dinosaur. 

Finally, researchers have found amounts of collagen in the bones of dinosaurs. The chemical structure of collagen is the same as the composition of connective tissues and bone marrow, which is similar to that of many contemporary species. But the listening claims, collagen cannot last for 70 million years. Any collagen that found in dinosaur must be the skin of some researchers who handled the bones without wearing a rubber glove.