What is your response to the findings of David Martill and David Unwin in their study, "Small Spheres in Fossil Bones: Blood Corpuscles or Diagenetic Products?"? Their claim is that they were FOSSILIZED RBC's, or actually pyrite framboids. Their research at least makes it SEEM as if these are not actually RBC's. Of course, the other hypothesis is that these are bacterial microfilms, which at some point someone has to wonder, "How did the bacteria get inside of a fossilized bone, and manage to leave RBC-like remnants inside?" Grace in Yahweh, THE Creator Jason.
Ever since the Mary H. Schweitzer's popularization of the "first" find of dino blood cells ... evo's have been at it trying to explain this thing away -- pitifully. (RBC's have been found in dino's as far back as the early 90's -- they were just in deep denial about it. Check out this article in Science in 1993!
Even Schweitzer herself had found them in '97, but nobody would listen to her then.
At first, in 2005, evo's tried to say that iron ions from the hemoglobin had catalyzed the "super polymerization" of the proteins, effectively making them into sheets of plastic-y material. They gave up on that pretty quick, since the muscle and blood had iron but the bone cells had little. Then they came up with the silly "biofilm" postulate -- oh my! A biofilm is a sorta slime that a group of bacteria will gang up together and ooze out and surround themselves with it. This protects them from fungal invaders and other damages. You could think of it as "bacterial snot." So this just happened to wind up in chunks -- yeah, sorta like boogers -- and they just happened to look like red blood cells (RBCs)? I don't think so. Each "booger" is exactly the shape of a modern reptile RBC. Each is also the exact size. Each is also -- red! And ... they are all lined up single-file going through a "tunnel" (a vein) running through one of the Haversian Canals in the bone tissue. Get -- over -- it -- evo's !!! These are RBCs in a blood vessel! And they're still there intact as complex biological molecular constructions -- after 68 mill yrs? NOT. Maybe the 4358 yrs since that t-rex drowned in Noah's Flood ... but not any longer than 100K years ... definitely not millions of years! So, as for the pyrite chunks ... much like the biofilm ... that argument is pitifully flimsy wishful thinking! Think about it. They are stuck! God bless ya Jason, I hope that this helped.