Ancient Dinosaur Blood Traces Survive 115 Million Years, Scientists Discover

Scientists have chemically confirmed the presence of blood remnants inside dinosaur bones that are 115 million years old, a finding that overturns long‑held limits on the durability of biological molecules. The discovery was made by analyzing fossilized bone samples from a Late Cretaceous specimen, where researchers detected preserved hemoglobin fragments that match modern blood chemistry. This unprecedented preservation suggests that complex proteins can endure far longer than previously believed, opening a new window into dinosaur physiology. By providing direct evidence of blood composition, the study offers a novel tool for reconstructing metabolic rates, immune function, and evolutionary adaptations in extinct species. The technique also holds promise for detecting similar biomolecules in extraterrestrial samples, potentially guiding future astrobiology missions.