# Scientists Discover 115-Million-Year-Old Dinosaur Blood Molecules Remarkable preservation of red blood cells challenges long-held assumptions about molecular decay in fossils. - **Source:** [ScienceDaily – Plants & Animals](https://www.sciencedaily.com/news/plants_animals) - **Published:** 2026-11-06 - **Topic:** [science](https://brifing.si/c/science) - **Original article:** - **On Brifing:** https://brifing.si/s/022d3cf4-1638-40fd-a3c9-8b8089819091 ## Ancient Biological Breakthrough Researchers have identified fossilized red blood cells and heme molecules within the bones of an Aratasaurus museunacionali. This meat-eating theropod lived 115 million years ago in what is now northeastern Brazil. The discovery provides the first definitive chemical confirmation of hemoglobin-derived molecules surviving across such an immense geological timeframe in history. ## The Role of Hausmannite The extraordinary preservation of these delicate biological structures is attributed to a mineral called hausmannite. This mineral acted as a natural stabilizer, protecting the blood cells and collagen-associated amino acids from decay. By creating a protective time capsule, the mineral prevented the typical breakdown of organic material over millions of years. ## Ideal Burial Conditions Beyond mineralization, the dinosaur's rapid burial in sediment likely played a critical role in this preservation. Scientists suspect an environment characterized by low oxygen levels and specific microbial activity helped shield the remains. These unique conditions prevented the standard degradation processes that usually destroy biological material shortly after an animal dies. ## Challenging Paleontological Assumptions This study directly contradicts the long-standing belief that hemoglobin and other blood-related molecules cannot survive deep time. Previously, researchers identified structures resembling blood cells but lacked conclusive chemical evidence of their molecular contents. This finding proves that under exceptional circumstances, biological remnants can persist far longer than scientists once thought possible. ## New Molecular Research Avenues The ability to detect intact heme-derived molecules opens new doors for molecular-level paleontology. Researchers can now investigate the evolution of blood, metabolism, and activity levels in extinct species. This molecular window allows scientists to reconstruct physiological aspects of ancient animals that were previously impossible to determine from bone structure alone. ## Implications for Astrobiology The discovery has significant implications for the field of astrobiology, which searches for life beyond Earth. If biological molecules can persist for over 100 million years, scientists must reconsider how they search for ancient organisms. This knowledge helps researchers identify potential chemical signatures of life in extreme environments across the universe. ## Collaborative Scientific Effort The research was a massive international effort led by Professor Kliti Grice of Curtin University. The team included experts from the Japan Agency for Marine-Earth Science and Technology, the Brazilian National Museum, and Johns Hopkins University. This collaboration was supported by a 2021 Australian Research Council Laureate Fellowship to ensure success. ## Future Research Directions The findings, published in the Proceedings of the National Academy of Sciences, suggest that many other fossils may contain overlooked molecular information. Future studies will likely focus on applying these advanced chemical detection methods to other specimens. This shift could fundamentally change how the scientific community understands the preservation of life. ## Sources covering this story - https://www.sciencedaily.com/releases/2026/11/261105224542.htm — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._