You know the phrase, you are what you eat? Well, it’s true. Isotopes from the water we drink and the water in the food we eat can tell scientists where we live, and where we have traveled and lived in the past. Isotope analysis is quickly becoming a forensic tool that when paired with DNA testing can help solve some of the oldest cold cases. We introduce you to an expert in the field who breaks it down for us and explains how it’s been used to help solve one of the most heinous crimes in Ireland. Full transcript available at https://www.whatremainspodcast.com.  Learn more about your ad choices. Visit megaphone.fm/adchoices