Dr. Munshi-South, associate professor of biological sciences at Fordham University joins host Hari Sreenivasan to discuss the evolutionary changes of rats and rodents in New York City. Researchers have been trapping rats and extracting their DNA to learn more about their evolutionary origins and interactions with urban environments. Dr. Munshi-South explains that rats have a wide range of genetic diversity and how rats located in one city may be biologically different than those of another city. SciTech Now airs weekly on public television stations nationwide (check local listings).For more for more stories like this visit scitechnow.orgLike us on Facebook: facebook.com/scitechnowFollow us on Twitter: @SciTechNowJoin the conversation with #SciTechNow