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.
In the beginning was the census. Every five years, each male Roman citizen had to register in Rome for the census. In this he had to declare his family, wife, children, slaves and riches. Should he fail to do this, his possessions would be confiscated and he would be sold into slavery. But registration meant freedom.