He was influenced by Immanuel kant , Johann Gottlieb Fichte and Georg Wilhelm Friedrich Hegel
The Ancient Greeks and Romans
The war took place in the United States and in Canada.
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