Scientists peeked inside a dinosaur bone. This could be the first such discovery in history

Researchers studying dinosaur remains from 115 million years ago discovered structures resembling fossilized red blood cells and chemical traces related to blood. This finding, made during the analysis of a small carnivorous dinosaur's bones in Brazil, challenges previous beliefs about the preservation of biological tissues over millions of years. The team, led by Professor Kliti Grice, published their results in PNAS. They found evidence of heme and amino acids, suggesting the potential for studying dinosaur blood and metabolism. However, some experts express skepticism about the identification of the structures as red blood cells, emphasizing the need for further investigation.