What Are Some Good Topics to do a Research Report on Ancient Rome?

For my social studies cl we have to do a research report on a topic that has to deal with Rome. Some examples are the colosseum, Julius Caesar, Cloaca Maxima, and the Appian Way. I would do one of these but other students are already doing them. By the way I am in 9th grade if that helps your search anymore. As many topics as you could think of is nice and if you have any information with the topics that would be great! Thanks.