Thanks to Libby who shared the following webpage with me to enrich this Libguide!
It's an article about Engineering in Ancient Rome and if you scroll down you can find more links to be explored if you are interested in this topic.
Reference books are great starting point for your research because they provide excellent overviews of subjects. Ask librarians if you are not sure how to use The World Book Encyclopedia or Britannica Student Encyclopedia.
The World Book Encyclopedia
Britannica Student Encyclopedia