This guide will help you with your Mini-Review Assignment in Communicating Research, BIOL:4898.
Original research articles are primary literature that will contain the methodology and results. Popular articles written for a general audience and review articles written to give an overview of several articles are secondary literature. Can you find the original research article from the popular article below? How about a review article on the topic?
You can search Ulrich's Web with a journal title to verify if the title is peer reviewed. Peer reviewed is also sometimes called refereed.