Chemists confirm hemoglobin traces inside 115-million-year-old dinosaur red blood cells
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A Curtin University–led international group analyzing Brazilian theropod Aratasaurus museunacionali limb bones published in PNAS the first definitive chemical proof of hemoglobin-derived heme inside mineralized dinosaur erythrocytes within vascular canals, alongside amino acids tied to collagen. At 115 million years, the fossils show fragile blood molecules can persist far longer than assumed, reshaping paleophysiology studies and analogies for seeking ancient life elsewhere.
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