Scientists recently found blood remnants in a mosquito fossil trapped in a supposed 46-million-year-old rock.1 Could blood really last that long? Publishing in the Proceedings of the National Academy of Sciences (PNAS), the researchers reported that they detected iron three times inside the fossil mosquito's abdomen, which strongly suggests the presence of still-fresh hemoglobin. They also confirmed the presence of heme groups (vitamin-like porphyrin molecules found in hemoglobin) only inside the abdomen, where living female mosquitos store the blood from their meals. The study authors wrote, "The combination of these two determinations indicates that the porphyrins are derived from the oxygen-carrying heme moiety of hemoglobin."
No scientific evidence supports the assertion that heme groups can last, even under circumstances that would maximize their preservation, for one million, let alone tens of millions of years. In fact, all longevity studies of biomolecules like hemoglobin, DNA, and collagen show decay rates in ranges that show total sample disintegration in a matter of months to a maximum of several hundred thousand years—assuming reasonable Earth surface temperatures.
[Read the rest of the article at the Institute for Creation Research.]