<em>Interviews are sources because they provide information about different things. Therefore, when writing a research paper an interview can be a valuable resource. Interviews often contain opinions and experiences that might enrich one's paper. Nevertheless, whether an interview is a primary source or a secondary source depends on who did the interview. If the author is the interviewer then it is considered a primary source. </em>
Thanks to a project called After Dark which uses robots to broadcast gallery tours via a web feed, people from around the world <em>have </em>the opportunity to visit London's Tate Britain art gallery from the comfort of their homes.