What are the two main processes scientists use to measure the age of Earth and its
parts?
Pls help

There can be more freedom for them

Answerglycogen;

This type of energy is called radiant energy.

They contributed many things, but here are some examples:

1) democracy - democracy as a political system was first implemented in ancient athens
2) some advances in mathematics - such as the pythagoras' law
3) the script - the roman script was adopted from ancient greek.