Time travel. Ancient coral reefs. Shark sleuthing. The AMAZING properties of shark skin...this episode has it all! We're chatting with Dr Erin Dillon, conservation paleobiologist and researcher at the Smithsonian Tropical Research Institute. Erin's work uses fossilised shark skin (fancy term: dermal denticles) as a window into the past, to understand what kinds of sharks were around on coral reefs thousands of years ago and how that has changed over time. It's a fascinating deep dive into shark life before humans made their mark, and an insight into what healthy reefs could look like with a little bit of help.  You can follow Erin's work by heading to her website, http://erinmdillon.wordpress.com, or by following Erin on social media (@erinmdillon).  You can find the shownotes for this episode here www.saveourseas.com/worldofsharks/podcast and find us on social media, we are @saveourseasfoundation on instagram and @SaveOurSeas on twitter.