We talk to Yara Haridy who has just completed her PhD on the histology of dinosaurs and other reptiles. On the podcast we normally just talk about whole bones and skeletons (or at least the bits of them that are preserved) but there is an enormous amount of information that is preserved in the fossilised cellular structures of these. Fossil bones are those that have turned to rock but that means that the original cellular structures are in there and these can reveal and whole host of information about the growth and physiology of ancient animals. Yara takes us through these and how we actually extract this information from bones that are hundreds of millions of years old. Links: Yara's websites with links to all her projects: https://ko-fi.com/yaraharidy and http://www.thebarebones.org