Kate and Matt are joined this episode by the chemical cowboy Declan Burke, who tells us all about the wonders of Hydrogen. Why is Hydrogen such a good fuel? How do we make Hydrogen fuel? Why hasn’t the world fully embraced it yet? We also tackle a listener question that builds on our previous episode as we plunge briefly back into the world of soap… can germs grow on a bar of soap? If so… can soap actually make us sick?Studies mentioned in episode: https://www.ncbi.nlm.nih.gov/pubmed/8264434https://www.ncbi.nlm.nih.gov/pubmed/17051871https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1256339/?page=1&fbclid=IwAR3hgwykglvB4ltFY0ZETvRzlmWMS4NQXo7AjWtL7r8FbWwGjKzs5bl_nyIhttps://www.ncbi.nlm.nih.gov/pubmed/?term=3402545&fbclid=IwAR1b2PKDweCQcUuEOvEIL2pfz2PthEKL525fG0YIMn2ycSSDMIEQScR1MEMYou can follow Curiosity Killed the Rat on twitter (https://twitter.com/CuriosityRat), Insta (https://www.instagram.com/curiosityrat/), and facebook (https://www.facebook.com/curiosityrat/), and email in your listener questions to curiosityrat@gmail.com