I Belive it is checks and balances.
Answer:
Reclaiming the money the government has spent into the economy. ...
Ratifying the value of money. ...
Reorganising the economy. ...
Redistributing income and wealth within the economy. ...
Repricing goods and services. ...
Raising representation in a democracy.
They do chemical examination to see how old is an artefact. Also based on previous objects, which were already dated by using a comparison can be determinated if the object is newer or older.
In addition, the scientist dig all the time so based on the excavations they make a thesis about what the live in this place was. If the same objects are found in another country for example , that means this people have traveled.. etc
The Indo-European language originated in Azerbaijan and Iran.