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 Romans called themselves lords of the world. And so it seemed they were. All the trade and skill, all the art and learning of the known world, were theirs. Beyond the borders of the Roman Empire the world was given over to wild barbarians, who were skilled neither in the arts of war nor of peace. That the civilization of Rome should go down before their ignorance seemed impossible. Yet the barbarian triumphed, Rome fell, and the mighty empire crumbled into dust.