Fossils turn out to be a rich source of information

For more than 70 years, fossilized arthropods from Quercy, France, were almost completely neglected because they appeared to be poorly preserved. Experts have now been able to X-ray the 30-million-year-old beetle fossils. The internal structures are shown in such detail that the scientists were able to create an extensive description and an evolutionary analysis of the beetles.
Paleontology News — ScienceDaily