Write a paragraph explaining how historians explore the past to understand events that happened long ago. Be sure to discuss at least four of these items in your explanation: artifacts, primary sources, secondary sources, narratives, historical maps, visual/mathematical quantitative data, radiocarbon dating, and DNA analysis.

Historians are changing their approach toward history because history is not just about dates and historical events. All the events are related to the culture of the society and there are many political and economic factors for an it. Studying past and to get the true answers about the past events one needs to look into these matters also. So they changed their approach and all these factors are taken into consideration.

Explanation:

the mexican-american war was a conflict between the united states and mexico, fought from april 1846 to february 1848.