KRASIEJOW, Poland (Reuters) — Polish scientists say they have discovered the world’s oldest preserved fossils of blood vessels and fragments of fossilized animal proteins inside 240 million-year-old bones. The discovery was made by a joint team of scientists from the University of Silesia, Jagiellonian University in Krakow, the Polish Academy of Sciences and a facility promoting the study of prehistoric fossils, the Science and Human Evolution Park in Krasiejow. Millions of years ago southern Poland […]