An analysis (with link to full scholarly critique) of this deceptive and slippery claim, which creationists continue to promote despite rebuttals from the very scientist whose work they are misdescribing. The red “blood” colour is merely iron oxide; the preserved structures are encased in bone mineral; the only preserved organics are fragments of notoriously tough connective proteins, stabilised by cross-linking over time (I would add from my own scientific experience that the microcomposite bone-collagen structure will add further stabilisation); and the scientist responsible (Mary Schweitzer, who happens to be a devout Christian) has herself protested against the use of her data to promote an indefensible Young Earth agenda.
For fossils as old as dinosaurs (over 65 million years), the conventional wisdom has been that no original organic material could remain. If the delicate structure of soft body parts is discernable, that is only because these parts were converted to some type of inorganic mineral in the fossilization process.
However, over the past two decades, paleontologist Mary Schweitzer has rocked our world by presenting visual evidence of soft tissues recovered from the interior of dinosaur bones, and biochemical evidence indicating that these are in fact the remnants of the original cells and structures from within the dinosaur bone pores. For instance, here is a network of blood vessels, containing little round red things that look like red blood cells:
High magnification of dinosaur vessels shows branching pattern (arrows) and round, red microstructures in the vessels. Source: Schweitzer, et al., “Soft-Tissue Vessels and Cellular Preservation in Tyrannosaurus rex”, Science, 307…
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