Heme Molecules and Cell-Like Shapes in a 115-Million-Year-Old Dinosaur Bone Test What Fossils Can Preserve
Nature World News | 06.11.2026 14:47A dinosaur leg bone that has been in museum collections since 2008 may contain the oldest chemical evidence of blood ever found in a fossil. In a study published Nov. 2 in the Proceedings of the National Academy of Sciences, an international team reported tiny, cell-like structures inside the bone's blood vessel canals along with heme B, the iron-bearing molecule that lets red blood cells carry oxygen.
