Ancient Blood Traces Found in 115-Million-Year-Old Dinosaur Fossil

• Red blood cells found in a 115-million-year-old dinosaur fossil from Brazil are the oldest chemical evidence of blood-related material in a dinosaur fossil.
• The research, published in the journal PNAS, claims to have uncovered fossilized red blood cells and amino acids of collagen.
• Some experts dispute the findings, stating that the shape of the cells does not match those of reptilian red blood cells.
• This discovery could potentially reshape our understanding of fossil preservation and molecular longevity in deep time.
• The research was led by an international team from Curtin University.