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Soft Tissue Found Inside a Dinosaur Bone!

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 Archeology / Paleontology   |   Biology   |   Science
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In 2003, an exceptionally well preserved T. rex leg bone was unearthed in the Cretaceous rocks of Montana. Upon close examination, Dr. Mary Schweitzer found the bone to contain soft tissue inside - tiny blood vessels and proteins! Some claim that this is evidence of a young Earth, a recent extinction of the dinosaurs. Could this be, or is there another explanation?

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Papers cited in this animation:

ORIGINAL DISCOVERY OF SOFT TISSUE:
Soft Tissue Vessels and Cellular Preservation in Tyrannosaurus rex: http://science.sciencemag.org/content/307/5717/1952

Soft tissue and cellular preservation in vertebrate skeletal elements from the Cretaceous to the present: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1685849/

CRITIQUE OF DISCOVERY:
Dinosaurian Soft Tissues Interpreted as Bacterial Biofilms: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2483347/

DEFENSES OF DISCOVERY:
Influence of Microbial Biofilms on the Preservation of Primary Soft Tissue in Fossil and Extant Archosaurs:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2953520/

Molecular analyses of dinosaur osteocytes support the presence of endogenous molecules: http://www.thebonejournal.com/article/S8756-3282(12)01318-X/fulltext

Testing the Hypothesis of Biofilm as a Source for Soft Tissue and Cell-Like Structures Preserved in Dinosaur Bone: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4771714/

10 million year old frog bones with marrow preserved: https://pubs.geoscienceworld.org/geology/article-abstract/34/8/641/129601/high-fidelity-organic-preservation-of-bone-marrow?redirectedFrom=fulltext

IRON’S ROLE IN PRESERVATION:
A role for iron and oxygen chemistry in preserving soft tissues, cells and molecules from deep time: http://rspb.royalsocietypublishing.org/content/281/1775/20132741

OTHER DINOSAURS WITH SOFT TISSUE DISCOVERED:
Mass Spectrometry and Antibody-Based Characterization of Blood Vessels from Brachylophosaurus canadensis: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4768904/

Evidence of preserved collagen in an Early Jurassic sauropodomorph dinosaur revealed by synchrotron FTIR microspectroscopy: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5290320/

Soft sheets of fibrillar bone from a fossil of the supraorbital horn of the dinosaur Triceratops horridus: https://www.ncbi.nlm.nih.gov/pubmed/23414624

Hemoglobin-derived porphyrins preserved in a Middle Eocene blood-engorged mosquito: https://www.ncbi.nlm.nih.gov/pubmed/24127577

Molecular preservation in Late Cretaceous sauropod dinosaur eggshells https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1599869/

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