Genetics is a majorly hot topic in biology right now -- everything is genome sequencing this, gene expression that -- but how much do we really know? We know a lot about which genes are present in which organisms, and what certain genes do, but not a lot about how or why they do it. Our guest today, Dr. Rob Philips, is a researcher at CalTech who is working to understand the language of gene regulation, and the methods we can use to understand how genes work.