Scientists have spent decades searching dinosaur fossils for clues about the animals that once ruled Earth. Now, a discovery involving 115-million-year-old bones has raised an extraordinary possibility: traces of dinosaur blood may have survived all this time.
This has raised questions about how we investigate prehistoric bones, and just how much they can tell us about our distant predecessors. But the evidence isn't quite as straightforward as the headlines suggest, and it's left the scientific community somewhat divided.
So, what could this discovery potentially mean? And is it even possible that such biological material has survived this long? Read on to find out.