Natural science can be broken into two main branches: life science (or biological science) and physical science. Physical science is further broken down into branches, including physics, astronomy, chemistry, and Earth science. All of these branches of natural science are divided into many further specialized branches (also known as fields), and each of these is known as a natural science.
When in Rome, do as the Romans do definition When visiting a foreign land, follow the customs of those who live in it. It can also mean that when you are in an unfamiliar situation, you should follow the lead of those who know the ropes.
The ancient Romans were sophisticated in surprising ways. Take going to the bathroom, for example. In first century Rome, there were over one hundred public latrines, many of them with marble seats, scenes from Greek mythology on the walls, running water and ancient Roman toilet paper provided.