TPO 24 T rex fossil

Recently, there is a ton of debate about remaining evidence inside a 70-million-year-old fossil of a T. rex's leg bone. More specifically, regarding the passage, the author puts forth the idea that according to some minerals found inside the bone, they seem to be remains of blood vessels, red blood cells, and collagen matrix. In the listening, the lecturer is quick to point out there are some serious flaws in the writer's claims. In fact, the professor believes that each remaining evidence inside the T. rex's leg bone is not what scientists believe to be, and addresses, in detail, the trouble with each point made in the reading text.

First of all, the writer states that many small branching channels inside of the bone probably correspond to hollows in the bones where blood vessels were once located. Some professionals in the same field stand in firm opposition to this claim. The professor, for example, believes that the soft substance found inside the channels are not blood vessels. According to the professor, there are some kinds of bacteria that colonize inside bones after the animal's death and this soft substance is probably the traces of soft moist residue of their colonies.

One group of scholars, represented by the writer, think that the presence of spheres inside the bone could be the remains of red blood cells because of the existence of iron which is vital to the role of red blood cells in transporting oxygen to tissues. Not all experts in the field believe this is accurate. Again, the professor addresses this point when he says that iron remains inside the bone is identical to the findings of some other animals. He states that these remains were also inside primitive animals that did not have any red blood cells. Hence, they cannot be of different origins. He posits that it originates from pieces of reddish mineral.

Finally, the writer wraps up this argument by proposing that the scientists found Collagen on the dinosaur leg bone, which is a fibrous protein that is the main component of living bone tissue, and it is evident that this is exactly the kind of biochemical material that one would expect to find in association with bone tissue. Not surprisingly, the professor takes issue with this claim by contending that Collagen cannot last long inside the animals. Therefore, finding Collagen inside a 70-million-year-old fossil will contradict our idea about its durability. He also explains that Collagen on this bone does not come from the T. rex, and it probably exists there because of scientists' skins.